Navigation (Radio) Regulations (Cth)

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C2004H02473

NAVIGATION (RADIO) REGULATIONS - Incorporating all amendments by legislation
made to 31 October 1980
- Reprinted as at 31 October 1980 (HISTREG CHAP 194 #DATE 31:10:1980)

*1* The Navigation (Radio) Regulations (in force under the Navigation Act 1912) as shown in this reprint comprise Statutory Rules 1968 No. 39 as amended by the other Statutory Rules specified in the following table: ---------------------------------------------------------------------------- Application, Date of saving or Year and notification Date of transitional number in Gazette commencement provisions ---------------------------------------------------------------------------- 1968 No. 39 20 Mar 1968 20 Mar 1968 1972 No. 117 27 July 1972 27 July 1972 - 1973 No. 121 28 June 1973 28 June 1973 - 1976 No. 224 7 Oct 1976 7 Oct 1976 - 1978 No. 122 13 July 1978 13 July 1978 - 124 13 July 1978 13 July 1978 - 136 13 July 1978 13 July 1978 R. 3 ----------------------------------------------------------------------------

NAVIGATION (RADIO) REGULATIONS - TABLE OF PROVISIONS

TABLE

TABLE OF PROVISIONS

PART I-PRELIMINARY

Regulation

1. Citation

2. Repeal

3. (Repealed)

4. Interpretation

5. Exemptions

6. Equivalents

PART II-GENERAL PROVISIONS

7. Provision of radiotelegraphy installation

8. Provision of radiotelephony installation

9. Climatic and durability tests

10. Interference, &c.

11. Maintenance of radio installation

12. High voltage parts

13. Batteries

14. Exemption of certain ships from requirements to keep a radio log-book

15. Radio log-book

PART III-RADIOTELEGRAPH SHIPS

16. Electrical independence of main and emergency equipment

17. Radiotelegraph room

18. Aerials

19. Range of transmitters

20. Supply of electrical energy

21. Reserve source of electrical energy not to be used except for certain purposes

22. Supply of electrical energy for testing

23. Documents to be carried on radiotelegraph ships on international voyages

24. Documents to be carried on board radiotelegraph ships on voyages other than international voyages

25. Radio Officers

26. Radio watch

27. Manner of keeping radio watch

28. Tests

29. Charging of batteries

30. Restriction of use of reserve transmitter

31. Entries in radio log-book

32. Posting of ship's position

PART IV-RADIOTELEGRAPHY EQUIPMENT IN OR FOR LIFEBOATS AND LIFERAFTS

33. Specifications for fixed installation

34. Portable equipment

35. Tests

PART V-RADIOTELEPHONE SHIPS

36. Aerial

37. Range

38. Source of electrical energy

39. Electrical energy for testing

40. Documents to be carried on radiotelephone ships

41. Miscellaneous requirements

42. Provision of radiotelephone operators

43. Radio watch by radiotelephone

44. Tests

45. Charging of batteries

46. Entries to be made in official log-book

PART VI-QUALIFICATIONS OF RADIO OFFICERS AND WIRELESS SIGNALLERS

47. Radio officers

48. Wireless signallers

PART VII-TRANSITIONAL PROVISIONS

49. Radiotelegraphy equipment installed before 1 July 1960

50. Auto-alarm wholly or partly installed before 20 March, 1968

51. (Repealed)

52. Regulation 9 not to apply to existing installation

53. (Repealed)

54. Existing installation on a radiotelephone ship

THE SCHEDULES

FIRST SCHEDULE

Radiotelegraphy Installations

SECOND SCHEDULE

Part 1-Main Radiotelephony Installation Part 2-Reserve Radiotelephony Installation

THIRD SCHEDULE

Climatic and Durability Tests

FOURTH SCHEDULE

Radiotelegraphy Equipment in or for Lifeboats and Liferafts

FIFTH SCHEDULE

Auto-alarm

SIXTH SCHEDULE

Radio Log-book

SEVENTH SCHEDULE

Table of Radio Watch Hours

NAVIGATION (RADIO) REGULATIONS - SECT. 1.
Citation

PART I-PRELIMINARY

1. These Regulations may be cited as the Navigation (Radio) Regulations.*1*

See notes to first article of this Chapter.

NAVIGATION (RADIO) REGULATIONS - SECT. 2.
Repeal

2. The Navigation (Radio) Regulations (comprising Statutory Rules 1959, No. 57) are repealed.

Regulation 3 repealed by 1978 No. 124 r. 1 * * * * * * * *

NAVIGATION (RADIO) REGULATIONS - SECT. 4.
Interpretation

Sub-reg. (1) amended by 1973 No. 121 r. 1; 1978 No. 136 r. 1 4. (1) In these Regulations, unless the contrary intention appears- "approved" means approved by the Minister, the Postmaster-General or an authorized officer; "at sea ", in relation to radio watch-keeping, means the period occupied in a voyage between the berth at one port of call and the berth at the next port of call; "authorized officer" means a person who is an authorized officer for the purposes of regulation 26 of the Wireless Telegraphy Regulations; "auto-alarm" means an apparatus of an approved type for automatically receiving and registering an alarm signal, being an apparatus that complies with the requirements specified in the Fifth Schedule; "Class I ship" means a passenger ship carrying, or authorized to carry, more than two hundred and fifty passengers; "Class II (a) ship" means a passenger ship that is not a Class I ship or a Class III (b) ship; "Class II (b) ship" means a cargo ship of not less than one thousand six hundred tons that is not a Class III (b) ship; "Class III (a) ship" means a cargo ship of less than one thousand six hundred tons but of not less than seven hundred and fifty tons; "Class III (b) ship" means- (a) a ship wholly engaged in the carriage of persons, stores and equipment in connexion with the operation off the coast of Australia or of a Territory of the Commonwealth of oil rigs or other structures for the purposes of the exploration for, or the exploitation of, petroleum resources; or (b) a ship (other than a ship carrying passengers or goods for hire or engaged in an international voyage) wholly engaged in activities approved by the Minister for the purposes of this paragraph, but does not include a Class I ship, a Class III (a) ship, a Class IV (a) ship, a Class IV (b) ship or a Class V ship; "Class IV (a) ship" means a cargo ship of less than seven hundred and fifty tons but of not less than three hundred tons that is not a Class IV (b) ship; "Class IV (b) ship" means a sailing ship of not less than three hundred tons equipped with auxiliary power; "Class V ship" means a cargo ship of less than three hundred tons; "connected" means electrically connected; "equipment" means equipment forming part of a radio installation; "existing installation" means- (a) an installation wholly installed before the commencement of these Regulations; or (b) an installation part of which was installed before the commencement of these Regulations and the remainder of which consists either of- (i) parts installed in replacement of identical parts; or (ii) parts which comply with the requirements of these Regulations; "new installation" means an installation installed on a ship after the commencement of these Regulations and includes an installation that replaces an existing installation; "new ship" means a ship the keel of which was laid after the commencement of these Regulations; "operating position ", in relation to any equipment, means the position normally occupied by a person when operating that equipment; "petroleum" has the same meaning as in the Petroleum (Submerged Lands) Act 1967; "prescribed officer" means a person holding, or for the time being performing the duties of, an office in the Department of Transport that is specified for the purposes of this definition by the Minister by instrument in writing; "radio surveyor" means a person, being a person skilled with regard to radio installations, appointed under section 190 of the Act to be a surveyor; "radiotelegraph ship" means a ship that is equipped with a radiotelegraphy installation in pursuance of these Regulations; "radiotelephony distress frequency" means the frequency of two thousand one hundred and eighty-two kilocycles per second; "radiotelephone ship" means a ship that is equipped with a radiotelephony installation in pursuance of these Regulations; "radio watch" means, in the case of a radiotelegraph ship, listening on the frequency of five hundred kilocycles per second and, in the case of a radiotelephone ship, listening on the frequency of two thousand one hundred and eighty-two kilocycles per second; "ship" does not include- (a) a Safety Convention ship in respect of which there is in force a valid Safety Convention certificate showing that the ship- (i) complies with such of the requirements of the Safety Convention as relate to radio installations and radio navigational aids; or (ii) is wholly exempt from those requirements or is partly exempt and complies with those requirements to the extent to which she is not exempt; (b) a ship trading exclusively between ports not more than twenty-five miles apart; (c) a ship being towed by another ship where that other ship is provided with a radiotelegraphy or radiotelephony installation that complies with these Regulations; (d) a river and bay ship; (e) a sailing ship not equipped with auxiliary power; or (f) an unpowered barge; "silence periods" means- (a) in the case of a radiotelegraph ship-periods of three minutes beginning at the expiration of fifteen minutes and forty-five minutes, respectively, after each hour of each day reckoned according to Greenwich Mean Time; and (b) in the case of a radiotelephone ship-periods of three minutes beginning at each hour, and at the expiration of thirty minutes after each hour, of each day reckoned according to Greenwich Mean Time; "the Act" means the Navigation Act 1912-1967; "the radiotelegraph room ", in relation to a radiotelegraph ship, means a room or adjoining rooms on the ship that is, or are, exclusively appropriated for the operation of the radio installation; "the Wireless Telegraphy Regulations" means the Wireless Telegraphy Regulations in force from time to time under the Wireless Telegraphy Act 1905-1966.

(2) Where a word or phrase used in these Regulations is defined in section 187A of the Act, that word or phrase as so used shall, unless the contrary intention appears, have the meaning given to it in that section.

(3) In these Regulations- (a) a reference to the tonnage of a ship shall be read as a reference to the gross registered tonnage of the ship; (b) a reference to a Schedule shall be read as a reference to a Schedule to these Regulations; (c) a reference to a wave, emission or signal of type A1 shall be read as a reference to radiotelegraphy by the keying of a continuous emission on and off; (d) a reference to a wave, emission or signal of type A2 shall be read as a reference to amplitude modulated radiotelegraphy by the keying of a modulating audio-frequency or of an emission continuously modulated by an audio-frequency; (e) a reference to a wave, emission or signal of type A3 shall be read as a reference to double sideband amplitude modulated radiotelephony; and (f) a reference to a wave or emission of type B shall be read as a reference to a damped emission.

(4) Parts II to V (inclusive) of these Regulations shall be read and construed subject to Part VII of these Regulations.

Added by 1978 No. 122 r. 1 (5) In these Regulations, a reference to a time of day expressed as 4 digits in hours is a reference to the time after midnight that is the number of hours (if any) equal to the number constituted by the first and second of those digits and the number of minutes (if any) less than an hour equal to the number constituted by the third and fourth of those digits.

Added by 1978 No. 122 r. 1 (6) For the purposes of sub-regulation (5), where the first of 2 digits constituting a number of hours or a number of minutes is 0, that number of hours or number of minutes, as the case may be, shall be taken to be the number constituted by the second of those 2 digits.

NAVIGATION (RADIO) REGULATIONS - SECT. 5.
Exemptions

5. (1) The Minister may- (a) exempt- (i) a Class II (b) ship; or (ii) a Class III (a) ship that is a radiotelegraph ship, from all or any of the requirements of Part III and Part VI of these Regulations; (b) exempt- (i) a Class III (a) ship that is a radiotelephone ship; or (ii) a Class III (b) ship, a Class IV (a) ship, a Class IV (b) ship or a Class V ship, from all or any of the requirements of Part V and Part VI of these Regulations; and (c) exempt- (i) a ship registered in a country to which the Safety Convention does not apply; or (ii) a ship of less than three hundred tons registered in a country to which the Safety Convention applies, from all or any of the requirements of Division 6A of Part IV of the Act and of these Regulations.

(2) Where the Minister is satisfied, as regards any ship, that compliance with a requirement of these Regulations is, in the circumstances of the case, unnecessary to secure the safety of the ship and of the persons on board, he may exempt the ship from the requirement.

Amended by 1978 No. 136 r. 2 (3) Where- (a) it is proposed to use a ship to make a voyage in the course of trade or commerce among the States; (b) the ship is not a ship that is regularly engaged in trade or commerce among the States; and (c) the ship is equipped with a radio installation that a prescribed officer considers satisfactory for the purposes of the voyage, the prescribed officer may exempt the ship from the requirements of these Regulations during the period of the voyage.

Amended by 1978 No. 136 r. 2 (4) An exemption under this regulation may be unconditional or subject to such conditions as the Minister or a prescribed officer, as the case may be, thinks fit.

NAVIGATION (RADIO) REGULATIONS - SECT. 6.
Equivalents

6. (1) Where a provision of these Regulations requires a particular fitting, material, appliance or apparatus, or type thereof, to be fitted or carried in a ship or a particular provision to be made in a ship, the Minister may allow any other fitting, material, appliance or apparatus, or type thereof, to be fitted or carried, or any other provision to be made, if he is satisfied that the other fitting, material, appliance or apparatus, or type thereof, or provision, is at least as effective as that required by that provision of these Regulations.

(2) The reference in the last preceding sub-regulation to a fitting, material, appliance or apparatus, or type thereof, or provision to be made in a ship shall not be read as including a reference to a fitting, material, appliance or apparatus, or type thereof, or provision to be made in a ship, in respect of which the Minister may exercise the powers conferred by sub-section (2) of section 191A of the Act.

NAVIGATION (RADIO) REGULATIONS - SECT. 7.
Provision of radiotelegraphy installation

PART II-GENERAL PROVISIONS

Sub-reg. (1) amended by 1978 No. 124 r. 2 7. (1) Subject to these Regulations- (a) a Class I ship; (b) a Class II (a) ship; (c) a Class II (b) ship; or (d) a Class III (a) ship that is not a radiotelephone ship, shall be equipped with a radiotelegraphy installation.

(2) A radiotelegraphy installation that is installed in a ship in pursuance of this regulation shall comply with the First Schedule.

(3) The main and reserve radiotelegraphy transmitters in a Class III (a) ship may be combined in a single instrument if that instrument complies with the requirements of the First Schedule in relation to those transmitters.

NAVIGATION (RADIO) REGULATIONS - SECT. 8.
Provision of radiotelephony installation

8. (1) Subject to these Regulations- (a) a Class III (a) ship that is not a radiotelegraph ship; or (b) a Class III (b) ship, shall be equipped with a main radiotelephony installation and a reserve radiotelephony installation.

(2) Subject to these Regulations, a Class IV (a) ship, a Class IV (b) ship or a Class V ship shall be equipped with a radiotelephony installation (in these Regulations referred to as a main radiotelephony installation).

(3) A main radiotelephony installation installed in a ship in pursuance of this regulation shall comply with Part 1 of the Second Schedule.

(4) A reserve radiotelephony installation installed in a ship in pursuance of this regulation shall comply with Part 2 of the Second Schedule.

NAVIGATION (RADIO) REGULATIONS - SECT. 9.
Climatic and durability tests

9. (1) Equipment that forms part of a radio installation with which a ship is equipped in pursuance of these Regulations, or is included in radiotelegraphy equipment carried on a ship in pursuance of the Navigation (Life-saving Appliances) Regulations shall be such that- (a) when undergoing the vibration, dry heat and low temperature tests in accordance with the Third Schedule; (b) when subject to the damp heat test in accordance with that Schedule; and (c) immediately after undergoing, in accordance with that Schedule, such other tests specified in that Schedule as are applicable to the equipment, it complies with the requirements of these Regulations and is free from mechanical defects.

(2) Equipment referred to in the last preceding sub-regulation that is intended for use in the open or in an open boat shall be such that, after undergoing the mould growth test specified in the Third Schedule, mould growth is not present on it.

NAVIGATION (RADIO) REGULATIONS - SECT. 10.
Interference, &c.

10. A radio installation with which a ship is equipped in pursuance of these Regulations shall be installed in such a position and manner, and other electrical apparatus on the ship shall be fitted with such devices, that the effective reception of radio signals by the radio installation is not hindered while the ship is at sea by interference caused by electrical or other apparatus on the ship.

NAVIGATION (RADIO) REGULATIONS - SECT. 11.
Maintenance of radio installation

11. A radio installation with which a ship is equipped in pursuance of these Regulations shall be so maintained that it is, at all times while the ship is at sea, capable of effectively transmitting and receiving radio signals.

NAVIGATION (RADIO) REGULATIONS - SECT. 12.
High voltage parts

12. (1) This regulation applies to parts and wiring of equipment with which a ship is equipped in pursuance of these Regulations that at any time are at an instantaneous voltage (other than radio-frequency voltage) exceeding fifty volts.

(2) Parts and wiring to which this regulation applies- (a) shall be protected from accidental access; and (b) shall, subject to the next succeeding sub-regulation, be so arranged that, if the means of protection are removed from any part or wiring, the part or wiring is isolated automatically from all sources of electrical energy.

(3) Paragraph (b) of the last preceding sub-regulation does not apply in relation to- (a) a generator or a converter; or (b) any other equipment (other than equipment specified in the Fourth Schedule) that is not at any time at an instantaneous voltage (other than radio-frequency voltage) exceeding two hundred and fifty volts.

(4) Capacitors in a transmitter to which this regulation applies shall be capable of being discharged.

NAVIGATION (RADIO) REGULATIONS - SECT. 13.
Batteries

13. (1) Batteries provided as a source of electrical energy for any equipment with which a ship is equipped in pursuance of these Regulations shall, as far as practicable, be so placed as to secure the greatest degree of safety and protection.

(2) Means shall be provided for the charging from the ship's main source of electrical energy of batteries referred to in the last preceding sub-regulation.

(3) In the case of a new installation with which a ship is equipped in pursuance of these Regulations, if the means of charging the batteries is a rotary converter an alternative means of charging the batteries shall be provided.

NAVIGATION (RADIO) REGULATIONS - SECT. 14.
Exemption of certain ships from requirements to keep a radio log-book

14. A Class III (a) ship, being a radiotelephone ship, a Class III (b) ship, a Class IV (a) ship, a Class IV (b) ship or a Class V ship that- (a) is required to keep an official log-book under section 171 of the Act; and (b) is not engaged on an international voyage, is exempted from the requirements of paragraph (a) of section 231E of the Act.

NAVIGATION (RADIO) REGULATIONS - SECT. 15.
Radio log-book

15. (1) The radio log-book required by section 231E of the Act to be kept shall be in accordance with the form set out in the Sixth Schedule.

(2) The master of a ship equipped with a radio installation shall- (a) cause the radio log-book of the ship to be kept in the room or place from which the radio installation is operated; and (b) upon request by a radio surveyor, cause the radio log-book to be made available for inspection by the radio surveyor.

(3) The master of a ship equipped with a radio installation and, if the ship carries more than one radio officer as part of her crew, the first radio officer shall inspect and sign the radio log-book once each day.

(4) On the expiration of the articles of agreement of a ship equipped with a radio installation, the master of the ship shall cause the radio log-book to be delivered to the superintendent at the port at which the articles expire.

Penalty: One hundred dollars.

NAVIGATION (RADIO) REGULATIONS - SECT. 16.
Electrical independence of main and emergency equipment

PART III-RADIOTELEGRAPH SHIPS

16. Subject to sub-regulation (3) of regulation 7 of these Regulations, the main and reserve radiotelegraphy equipment provided on a radiotelegraph ship shall be electrically independent of each other.

NAVIGATION (RADIO) REGULATIONS - SECT. 17.
Radiotelegraph room

17. (1) The radiotelegraphy installation on a radiotelegraph ship shall be installed in the radiotelegraph room.

(2) The radiotelegraph room shall- (a) be situated as high as practicable in the ship and in such a position that there will be no interference by extraneous noises or otherwise with the effective reception of radio signals; and (b) be of sufficient size and sufficiently ventilated to enable the radiotelegraphy installation to be operated efficiently.

(3) The radiotelegraphy installation in the radiotelegraph room shall be installed in such a manner that it- (a) is protected against disturbance of its effectiveness by water or by extremes of temperature; (b) does not affect the ship's compass; and (c) is, at all times when the ship is at sea, readily accessible both for immediate use and for repair.

(4) The sleeping accommodation of at least one radio officer shall be situated as near as practicable to the radiotelegraph room and in new ships that accommodation shall not be within the radiotelegraph room.

(5) The radiotelegraph room shall be provided with- (a) an efficient two-way means of calling and voice communication with the bridge and any other place from which the ship is normally navigated, the method of communication being- (i) by a voicepipe or a telephone, or by other means that, in the opinion of a radio surveyor, is equally efficient; and (ii) independent of the main communication system of the ship and of the ship's main source of electrical energy; (b) a reliable clock equipped with a dial not less than five inches in diameter that is marked to indicate the silence periods and a centre second-hand, being a clock securely mounted in such a position that the entire dial can be easily and accurately observed from the operating position and, if the ship is provided with an auto-alarm, from the position normally occupied by a person testing the auto-alarm; (c) an electric lamp- (i) operated from the source of electrical energy referred to in sub-regulation (5) of regulation 20 of these Regulations; (ii) permanently arranged so as to be capable of providing adequate illumination of the operating controls of the main and reserve radiotelegraphy installations and of the clock referred to in the last preceding paragraph; and (iii) controlled by two-way switches placed respectively near the entrance to the room or place from which the installation is operated and at the operating position and clearly labelled to indicate their purpose; (d) if the electric lamp referred to in the last preceding paragraph does not provide adequate illumination of the operating controls of the switchboard referred to in sub-regulation (5) of regulation 20 of these Regulations, an electric lamp capable of providing such illumination and operated from the source of electrical energy referred to in that sub-regulation; (e) an additional electric lamp for use as an inspection lamp operated from the source of electrical energy referred to in sub-regulation (5) of regulation 20 of these Regulations and provided with a flexible lead of sufficient length to enable all parts of the radiotelegraphy installation to be illuminated; and (f) a chair capable of being fixed at the operating position.

(6) A complete list of equipment and spare parts carried on board a ship for the maintenance of the radiotelegraphy installation, being a list indicating where the equipment and spare parts are kept, shall be provided in the radiotelegraph room.

(7) A calibration table or calibration curve for each transmitter and receiver forming part of the radiotelegraphy installation on a ship shall, unless the transmitter or receiver, as the case may be, is directly calibrated, be provided in the radiotelegraph room.

(8) In the case of a new installation, a complete diagram of the installation as wired shall be provided in the radiotelegraph room.

NAVIGATION (RADIO) REGULATIONS - SECT. 18.
Aerials

18. (1) Subject to the next succeeding sub-regulation, a radiotelegraphy ship- (a) shall be fitted with a main aerial and a reserve aerial, each of which shall be properly erected; and (b) shall be provided with sufficient parts and other equipment to replace the main aerial.

(2) The Minister may exempt a ship from the requirement that it be fitted with a reserve aerial if he is satisfied that the fitting of such an aerial is, in all the circumstances, impracticable or unreasonable.

(3) Where a ship is exempted under the last preceding sub-regulation, the spare aerial required to be carried on the ship under sub-regulation (1) of this regulation shall- (a) in the case of a supported wire aerial-be in a completely assembled state and ready for rapid erection while the ship is at sea; or (b) in any other case-be ready for rapid erection while the ship is at sea.

(4) Except in the case of a Class III ship, each of the halyards used for supporting the main aerial shall be fitted with a safety loop between the masthead or other aerial support and an aerial insulator.

(5) The safety loop shall consist of a part of the halyard not less than three feet in length, the loop being closed by a link not more than one foot three inches in length with a breaking load not exceeding one-third of the breaking load of the aerial or the halyard, whichever is the less.

(6) The lead-in insulators for the main and reserve aerials through which the transmitters are connected to the base of the aerials shall be protected against the effects of sea spray by the use of metallic tubes or shields.

(7) A rigging plan of the aerials showing- (a) elevation and plan views of the aerials; (b) the measurements of the aerials in feet and inches; and (c) the height of the aerials in metres measured in the manner specified in sub-regulation (3) of the next succeeding regulation, shall be provided in the radiotelegraph room.

(8) The main aerial and the reserve aerial (if any) shall, where practicable, be so rigged that damage to one will not affect the efficiency of the other.

(9) The main aerial and the reserve aerial (if any) shall each be capable of being connected, as circumstances require, to- (a) the main transmitter; (b) the main receiver; (c) the reserve transmitter; (d) the reserve receiver; and (e) the auto-alarm.

NAVIGATION (RADIO) REGULATIONS - SECT. 19.
Range of transmitters

19. (1) The normal ranges of the radiotelegraphy transmitters with which a ship is equipped in pursuance of these Regulations shall- (a) in the case of a Class I ship, a Class II (a) ship or a Class II (b) ship-be not less than one hundred and fifty miles for the main transmitter and not less than one hundred miles for the reserve transmitter; and (b) in any other case-be not less than one hundred miles for the main transmitter and not less than seventy-five miles for the reserve transmitter.

(2) The normal range of a radiotelegraphy transmitter for the purposes of these Regulations shall be determined either by reckoning or by test, at the option of the owner of the ship.

(3) The normal range of a radiotelegraphy transmitter determined by reckoning shall be ascertained- (a) by calculating the product of the root mean square current in amperes at the base of the main aerial and the maximum height in metres of the aerial measured from the load line mark indicating the greatest depth to which the ship may at any time or place be submerged in accordance with the Navigation (Load Lines) Regulations or, if there is no such mark on the ship, from the mean level of the surface of the water in which the ship is afloat; and (b) by determining the range, having regard to that product, in accordance with the following table: ---------------------------------------------------------------------- Product Range in miles ---------------------------------------------------------------------- Not less than 76 . . . . . . . . . Not less than 150 Less than 76 but not less than 45 . Less than 150 but not less than 100 Less than 45 but not less than 34 . Less than 100 but not less than 75 Less than 34 but not less than 10 . Less than 75 but not less than 25 ---------------------------------------------------------------------- (4) For the purposes of the last preceding sub-regulation, transmission shall be conducted on the frequency of five hundred kilocycles per second using signals of type A2.

(5) The normal range of a radiotelegraphy transmitter determined by test is the distance to which signals of type A2 can be transmitted by the transmitter over the sea by day under normal conditions on the frequency of five hundred kilocycles per second so as to set up at the receiver a total root mean square field strength of not less than fifty microvolts per metre.

NAVIGATION (RADIO) REGULATIONS - SECT. 20.
Supply of electrical energy

20. (1) There shall be available in a radiotelegraph ship a supply of electrical energy from the ship's main source of electrical energy sufficient for the operation of the main radiotelegraphy equipment in accordance with these Regulations and for charging batteries that are a source of electrical energy for the radiotelegraphy installation.

(2) The rated voltage of the supply of electrical energy for the main equipment shall be maintained within a tolerance of plus or minus ten per centum.

(3) Where the supply of electrical energy is a direct current supply, it shall be of correct polarity.

(4) In a Class III (a) ship not engaged on an international voyage, the supply of electrical energy may be derived from a battery or a set of batteries, but, except in the case of a single battery on float charge where provision is made to the satisfaction of a radio surveyor to protect the equipment from the application of excessive voltage, a duplicate battery or set of batteries shall also be provided.

(5) There shall be available in a radiotelegraph ship a source of electrical energy for the operation of the reserve radiotelegraphy equipment that is independent of the propelling power of the ship and of the rest of the ship's electrical installation and is capable of being brought into immediate operation by means of a switchboard situated in, or readily accessible from, the radiotelegraph room.

(6) A source of electrical energy provided in a ship in compliance with the last preceding sub-regulation shall be of such capacity, and shall be so maintained at all times when the ship is at sea, as to be capable of supplying continuously for a period of six hours (whether or not it is in use for any other purpose) a total current equal to the sum of- (a) one half of the current required to operate the reserve transmitter with the key down; (b) one half of the current required to operate the reserve transmitter with the key up; (c) the current required to operate the reserve receiver; and (d) the current consumed by the equipment referred to in paragraphs (b), (c), (d), (e) and (f) of the next succeeding regulation.

NAVIGATION (RADIO) REGULATIONS - SECT. 21.
Reserve source of electrical energy not to be used except for certain
purposes

21. The master of a radiotelegraph ship shall not use, or permit to be used, the source of electrical energy provided on the ship in pursuance of sub-regulation (5) of the last preceding regulation, except for the operation of- (a) a transmitter or receiver; (b) the lamps referred to in paragraphs (c), (d) and (e) of sub-regulation (5) of regulation 17 of these Regulations; (c) the automatic keying device; (d) an auto-alarm; (e) a direction-finder; or (f) the device referred to in sub-item (4) of item 13 of the First Schedule.

Penalty: Two hundred dollars.

NAVIGATION (RADIO) REGULATIONS - SECT. 22.
Supply of electrical energy for testing

22. The master of a radiotelegraph ship shall cause a sufficient supply of electrical energy for testing the radiotelegraphy installation on the ship to be available at all reasonable times while the ship is in port.

Penalty: Two hundred dollars.

NAVIGATION (RADIO) REGULATIONS - SECT. 23.
Documents to be carried on radiotelegraph ships on international voyages

23. There shall be carried on board a radiotelegraph ship engaged on an international voyage- (a) the ship's radio log-book; (b) a copy of the latest edition of each of the following documents published by the International Telecommunication Union, Geneva: (i) Alphabetical List of Call Signs of Stations used by the Maritime Mobile Service; (ii) List of Coast Stations; (iii) List of Ship Stations; (iv) List of Radiodetermination and Special Service Stations; and (v) Manual for use by the Mobile Services; (c) a copy of the latest edition of the Handbook for Radio Operators in the Maritime Mobile Service published by the Postmaster-General's Department; and (d) a copy of these Regulations.

NAVIGATION (RADIO) REGULATIONS - SECT. 24.
Documents to be carried on board radiotelegraph ships on voyages other than
international voyages

Amended by 1973 No. 121 r. 2 24. There shall be carried on board a radiotelegraph ship not engaged on an international voyage- (a) the ship's radio log-book; (b) a copy of the latest edition of each of the following documents published by the International Telecommunication Union, Geneva: (i) Alphabetical List of Call Signs of Stations used by the Maritime Mobile Service; (ii) List of Ship Stations; (iii) Manual for use by the Mobile Services; (c) a copy of the latest edition of the Handbook for Radio Operators in the Marine Mobile Service published by the Postmaster-General's Department; and (d) a copy of these Regulations.

NAVIGATION (RADIO) REGULATIONS - SECT. 25.
Radio Officers

25. (1) A radiotelegraph ship, not being a ship equipped with an auto-alarm, shall carry, as part of her crew- (a) in the case of a Class I ship-three radio officers; (b) in any other case-two radio officers if the ship is to be at sea for not more than forty-eight hours between consecutive ports, and three radio officers if the ship is to be at sea for more than forty-eight hours between consecutive ports.

(2) A radiotelegraph ship equipped with an auto-alarm shall carry, as part of her crew- (a) in the case of a Class I ship engaged on an international voyage-two radio officers; and (b) in any other case-one radio officer.

(3) Where a radiotelegraph ship (other than a Class III (a) ship) is registered in Australia or engaged in the coasting trade- (a) one radio officer carried as part of the crew shall have had experience at sea in the operation of radiotelegraphy installations for a total of not less than- (i) in the case of a Class I ship-two years; (ii) in the case of a Class II (a) ship-one year; or (iii) in the case of a Class II (b) ship-three months; and (b) in the case of a passenger ship-one radio officer (whether the officer referred to in the last preceding paragraph or another radio officer) carried as part of the crew shall be the holder of a valid First Class Commercial Operator's Certificate of Proficiency issued and in force under the Wireless Telegraphy Regulations or a valid certificate issued and in force under a law of a Commonwealth country and included in a class of certificates declared under paragraph (b) of sub-regulation (1) of regulation 47 of these Regulations to be the equivalent of a First Class Commercial Operator's Certificate of Proficiency.

(4) For the purposes of this regulation, a ship equipped with an auto-alarm that is not operating effectively shall be deemed not to be equipped with an auto-alarm.

NAVIGATION (RADIO) REGULATIONS - SECT. 26.
Radio watch

Sub-reg. (1) amended by 1978 No. 122 r. 2 26. (1) Subject to the next succeeding regulation, radio watch shall be maintained on a radiotelegraph ship by a radio officer while the ship is at sea, as follows: (a) if the ship is not equipped with an auto-alarm-a continuous watch; (b) if the ship is equipped with an auto-alarm and is a Class I ship engaged on an international voyage-a radio watch of 16 hours on each day at the times specified in Part A of the Seventh Schedule; or (c) in any other case-a radio watch of 8 hours on each day at the times specified in Part B of that Schedule.

Amended by 1978 No. 122 r. 2 (2) Subject to the next succeeding sub-regulation, an auto-alarm provided on board a radiotelegraph ship shall be kept in operation at all times at which a radio watch is not being maintained under paragraph (b) or (c) of sub-regulation (1) unless- (a) the auto-alarm has broken down since the ship last put to sea; and (b) it is impracticable to repair it at sea so as to operate effectively.

(3) The auto-alarm may be taken out of operation when radio bearings are being determined by means of the direction-finder if- (a) the aerial of the radiotelegraph auto-alarm equipment would, if the auto-alarm were in operation, affect the accuracy of radio bearings obtained by means of the direction-finder; and (b) it is impracticable to erect the aerial in another position in which it would not affect the accuracy of those bearings.

NAVIGATION (RADIO) REGULATIONS - SECT. 27.
Manner of keeping radio watch

27. (1) Subject to the next succeeding sub-regulation, radio watch on a radiotelegraph ship shall be maintained by a radio officer by means of headphone reception in the radiotelegraph room.

(2) Radio watch may be maintained by means of loudspeaker reception (or, if that is impracticable, may be dispensed with, except during the silence periods) for such periods as may be necessary to enable the radio officer on duty in the radiotelegraph room, without leaving that room, to perform other duties in compliance with these Regulations or to engage in communication on other frequencies in connexion with the business of the ship.

NAVIGATION (RADIO) REGULATIONS - SECT. 28.
Tests

28. (1) A radio officer on a radiotelegraph ship equipped with an auto-alarm shall, when radio watch ceases to be maintained during or at the end of his period of duty, connect the auto-alarm with the ship's main aerial or with any other efficient aerial, and shall put the auto-alarm into operation.

(2) A radio officer who, under the last preceding sub-regulation, is required to put an auto-alarm into operation shall, before going off duty- (a) test the efficiency of the auto-alarm; and (b) immediately report the result of the test to the master of the ship or to the officer in charge of the navigation of the ship at that time.

(3) A radio officer shall, if an auto-alarm is connected to an aerial when he goes on duty, immediately test the efficiency of the auto-alarm before making any adjustment to it.

(4) While a radiotelegraph ship is at sea, the radio officer or, if the ship carries as part of her crew more than one radio officer, the first radio officer shall- (a) where a reserve transmitter is employed, test it at least once on each day connected with an artificial aerial that complies with the requirements specified in item 48 of the First Schedule; (b) if the ship carries a reserve aerial, test the reserve radiotelegraphy transmitter connected with that aerial at least once during each voyage; (c) test, at least once on each day by voltmeter and once during each month by hydrometer, batteries that are a source of energy for the radiotelegraphy installation, the batteries being placed on normal load during voltage tests; (d) test any other sources of electrical energy provided for the reserve radiotelegraphy equipment at least once on each day; (e) test the audible alarm circuits and the bells forming part of the auto-alarm installation at least once on each day; and (f) if the ship is equipped with an auto-alarm, check, once each week, the functioning of the auto-alarm receiver by listening to signals received on it and comparing them with similar signals received on the radiotelegraph distress frequency on the main receiver, each receiver being connected to its normal aerial.

Penalty: One hundred dollars.

NAVIGATION (RADIO) REGULATIONS - SECT. 29.
Charging of batteries

29. All batteries that are a source of electrical energy for any part of the radiotelegraphy installation on a radiotelegraph ship and are found not to be fully charged shall be fully charged as soon as practicable.

NAVIGATION (RADIO) REGULATIONS - SECT. 30.
Restriction of use of reserve transmitter

30. (1) Subject to the next succeeding sub-regulation, the transmitter forming part of the reserve radiotelegraphy equipment on a ship shall not be used to transmit messages, other than urgent messages relating to preservation of life at sea, unless the transmitter complies with the requirements specified in items 5, 8, 10, 11, 12 and 13 of the First Schedule.

(2) The last preceding sub-regulation does not apply if the main transmitter has broken down and cannot be repaired while the ship is at sea.

NAVIGATION (RADIO) REGULATIONS - SECT. 31.
Entries in radio log-book

31. (1) The following entries shall be made in the radio log-book of a radiotelegraph ship: (a) the name of each radio officer who goes on duty and the times at which he goes on and off duty; (b) the identifying number of each message transmitted or received, together with the time and date of its transmission or reception, the station to which each message is transmitted and the station from which each message is received; and (c) details of incidents occurring that relate to the radiotelegraphy installation or the operation of that installation and which appear to the radio officer on duty to be of importance to the safety of life at sea and, in particular- (i) the full text of all messages transmitted or received that relate to immediate assistance required by persons in distress at sea or above the sea; (ii) the full text of all messages transmitted, and, except where the master otherwise directs, the full text of all messages received, that are preceded by a signal in general international use as an urgency signal or a safety signal; (iii) a record of the radio watch maintained during each of the silence periods; (iv) a record of the occurrence of any incident that affects the efficiency of the radiotelegraphy installation; (v) a record of the tests conducted in accordance with sub-regulations (2), (3) and (4) of regulation 28 of these Regulations and of the results of those tests; (vi) a record of the charging of batteries used as a source of energy for the radiotelegraphy installation; and (vii) if the ship is equipped with an auto-alarm, details of any failure or repair of the auto-alarm.

(2) An entry shall be made in the radio log-book of a radiotelegraph ship at least once each day recording the time shown by the clock in the radiotelegraph room in comparison with Greenwich Mean Time and any correction made in respect of that clock.

NAVIGATION (RADIO) REGULATIONS - SECT. 32.
Posting of ship's position

32. The master of a radiotelegraph ship shall cause the position, and the true course and speed, of the ship to be posted every four hours in the radiotelegraph room.

Penalty: One hundred dollars.

NAVIGATION (RADIO) REGULATIONS - SECT. 33.
Specifications for fixed installation

PART IV-RADIOTELEGRAPHY EQUIPMENT IN OR FOR LIFEBOATS AND LIFERAFTS

33. (1) The radiotelegraphy installation required by the Navigation (Life-saving Appliances) Regulations to be fitted in a lifeboat shall comply with the requirements of Part 1 of the Fourth Schedule.

(2) The master of the ship in which the lifeboat is carried shall not use the battery included in the radiotelegraphy installation of the lifeboat, or permit it to be used, except for the operation of the installation or of the searchlight provided in the lifeboat.

Penalty: One hundred dollars.

NAVIGATION (RADIO) REGULATIONS - SECT. 34.
Portable equipment

34. Portable radiotelegraphy equipment required by the Navigation (Life-saving Appliances) Regulations to be carried in a ship for use in a lifeboat or a liferaft in the event of an emergency shall comply with the requirements of Part 2 of the Fourth Schedule.

NAVIGATION (RADIO) REGULATIONS - SECT. 35.
Tests

35. (1) When a ship is provided with a lifeboat equipped with a radiotelegraphy installation in compliance with the Navigation (Life-saving Appliances) Regulations or portable radiotelegraphy equipment is carried on the ship in compliance with those Regulations, the radio officer, or if the ship carries as part of her crew more than one radio officer, the first radio officer or, if the ship does not carry a radio officer as part of her crew, the wireless signaller, shall, at intervals not exceeding seven days while the ship is at sea- (a) cause the transmitter forming part of the installation or equipment to be tested with its artificial aerial; and (b) cause any batteries, other than self-priming batteries, that are a source of electrical energy for the installation or equipment to be tested by voltmeter, with the batteries on normal load, and by hydrometer and, if found not to be fully-charged, to be fully charged as soon as practicable.

Penalty: One hundred dollars.

(2) The results of the tests referred to in the last preceding sub-regulation shall be entered in the radio log-book of the ship or, if the ship is exempted under regulation 14 of these Regulations from the requirement to keep a radio log-book, in the official log-book of the ship.

NAVIGATION (RADIO) REGULATIONS - SECT. 36.
Aerial

PART V-RADIOTELEPHONE SHIPS

36. (1) A radiotelephone ship shall be fitted with a properly erected aerial and, in addition, shall carry a spare aerial completely assembled for immediate erection.

(2) A rigging plan of the fitted aerial showing- (a) elevation and plan views of the aerial; (b) the measurements of the aerial in feet and inches; and (c) the maximum height of the aerial in metres measured from the lead-out insulator, shall be provided and kept in an accessible place on the ship.

NAVIGATION (RADIO) REGULATIONS - SECT. 37.
Range

37. (1) The normal range of a radiotelephony transmitter with which a ship is equipped in pursuance of these Regulations shall be not less than- (a) in the case of a ship other than a Class V ship-one hundred and fifty miles; or (b) in the case of a Class V ship-seventy-five miles.

(2) The normal range of a radiotelephony transmitter for the purposes of these Regulations shall be determined either by reckoning or by test, at the option of the owner of the ship.

(3) The normal range of a radiotelephony transmitter determined by reckoning shall be ascertained by calculating the product of the root mean square current in amperes at the base of the aerial on the radio-telephony distress frequency and the maximum height in metres of the aerial measured from the lead-out insulator.

(4) A transmitter shall be deemed to comply with the requirements of this regulation if the product so ascertained is not less than- (a) in the case of a ship other than a Class V ship- (i) 7.5 metre-amperes, where the aerial has a horizontal top-length of not less than one half of its maximum height measured from the lead-out insulator; or (ii) 12.8 metre-amperes, in any other case; or (b) in the case of a Class V ship- (i) 4 metre-amperes, where the aerial has a horizontal top-length of not less than one half of its maximum height measured from the lead-out insulator; or (ii) 6.5 metre-amperes, in any other case.

(5) The normal range of a radiotelephony transmitter when determined by test is the distance to which signals can be transmitted over the sea by day under normal conditions on the radiotelephony distress frequency so as to set up at the receiver by the unmodulated carrier a total root mean square field strength of not less than twenty-five microvolts per metre.

NAVIGATION (RADIO) REGULATIONS - SECT. 38.
Source of electrical energy

38. (1) There shall be available in a radiotelephone ship- (a) a source of electrical energy capable of operating the main radiotelephony installation in the ship; (b) in the case of a Class III (a) ship or a Class III (b) ship-a source of electrical energy (in this regulation referred to as a "reserve source of electrical energy ") located in the upper part of the ship and capable of operating the reserve radiotelephony installation in the ship without the use of ancillary equipment; and (c) in the case of a Class IV (a) ship, a Class IV (b) ship or a Class V ship- (i) a source of electrical energy (in this regulation referred to as a "reserve source of electrical energy ") located in the upper part of the ship and capable of operating the main radiotelephony installation in the ship; and (ii) if the source of electrical energy referred to in the last preceding sub-paragraph is not capable of operating the main radiotelephony installation without the use of ancillary equipment, the ancillary equipment required, together with a reserve of such ancillary equipment, so connected as to be capable of being put into immediate operation.

(2) Paragraph (b) or (c) of the last preceding sub-regulation does not apply in relation to a ship if- (a) the source of electrical energy provided in the ship in compliance with paragraph (a) of that sub-regulation is a single battery or set of batteries on floating charge that complies with the requirements of sub-regulation (4) of this regulation with respect to a reserve source of electrical energy and- (i) in the case of a Class III (a) ship or a Class III ( b) ship-the requirements of paragraph (b) of that sub-regulation; or (ii) in the case of a Class IV (a) ship, a Class IV (b) ship or a Class V ship-the requirements of paragraph (c) of that sub-regulation; and (b) provision is made to the satisfaction of a radio surveyor to protect the radio equipment from the application of excessive voltage.

(3) Sub-paragraph (ii) of paragraph (c) of sub-regulation (1) of this regulation does not apply in relation to a ship if- (a) the ship is equipped with a reserve radiotelephony installation that complies with Part 2 of the Second Schedule; and (b) there is available on the ship a source of electrical energy located in the upper part of the ship and capable of operating that installation without the use of ancillary equipment.

(4) A reserve source of electrical energy- (a) shall be independent of the propelling power of the ship and of the rest of the ship's electrical installation; (b) shall be capable of being brought into immediate operation by means of a switchboard readily accessible from the operating position of the radiotelephony installation; and (c) shall be provided only for the operation of the following equipment: (i) the radiotelephony installation (including a radiotelephone alarm signal generating device); (ii) the electric lamp referred to in paragraph (d) of regulation 41 of these Regulations; (iii) a direction-finder; and (iv) low power emergency circuits that are wholly confined to the upper part of the ship.

(5) The master of a ship in which a reserve source of electrical energy or a source of electrical energy referred to in sub-regulation (2) of this regulation is provided shall not use, or permit the use of, that source for any purpose other than the operation of equipment specified in paragraph (c) of the last preceding sub-regulation.

Penalty: Two hundred dollars.

(6) Each source of electrical energy provided in a ship in compliance with this regulation for the operation of a radiotelephony installation shall be of such capacity, and shall be so maintained at all times when the ship is at sea, as to be able to supply continuously for a period of six hours a total current equal to the sum of- (a) one-half of the current required to operate the radiotelephony transmitter of the installation for the transmission of speech; (b) the current required to operate the radiotelephony receiver of the installation; (c) the current consumed by the electric lamp referred to in paragraph (d) of regulation 41 of these Regulations; (d) one-quarter of the current required to operate the radiotelephone alarm signal generating device; and (e) the current required to operate the direction-finder and low power emergency circuits referred to in sub-paragraphs (iii) and (iv) of paragraph (c) of sub-regulation (4) of this regulation.

(7) When the batteries for the radiotelephony transmitter of the main radiotelephony installation or of a reserve radiotelephony installation are not in use, each battery shall be capable of being fully charged within a period of not more than sixteen hours by the means of charging referred to in regulation 13 of these Regulations.

NAVIGATION (RADIO) REGULATIONS - SECT. 39.
Electrical energy for testing

39. The master of a radiotelephone ship shall cause a sufficient supply of electrical energy for testing the radiotelephony installation, and for charging batteries that are a source of electrical energy for the radiotelephony installation, in the ship to be available at all reasonable times when the ship is in port.

Penalty: Two hundred dollars.

NAVIGATION (RADIO) REGULATIONS - SECT. 40.
Documents to be carried on radiotelephone ships

40. (1) There shall be carried on board a radiotelephone ship engaged on an international voyage- (a) the ship's radio log-book; (b) a copy of the latest edition of each of the following documents published by the International Telecommunication Union, Geneva: (i) List of Coast Stations; and (ii) Manual for use by the Mobile Services; (c) a copy of the latest edition of the Handbook for Radio Operators in the Maritime Mobile Service published by the Postmaster-General's Department; and (d) a copy of these Regulations.

(2) There shall be carried on board a radiotelephone ship not engaged on an international voyage the documents specified in sub-paragraph (ii) of paragraph (b), and paragraphs (c) and (d), of the last preceding sub-regulation.

NAVIGATION (RADIO) REGULATIONS - SECT. 41.
Miscellaneous requirements

41. In a radiotelephone ship- (a) the radiotelephony installation shall be installated in a position approved by a radio surveyor having regard to the need to install the installation- (i) as high as practicable in the ship; (ii) in such a position that the installation is subject to the least interference by extraneous noises or otherwise with the effective reception of radio signals; and (iii) in such a position that the installation does not affect the ship's compass; (b) an efficient two-way means of communication shall be provided between the place of installation and the place from which the ship is normally navigated; (c) a reliable clock shall be securely mounted within the view of a person at the operating position of the installation; (d) an electric lamp shall be provided and shall- (i) be operated from the reserve source of electrical energy referred to in regulation 38 of these Regulations or a source of electrical energy referred to in sub-regulation (2) of that regulation; (ii) be permanently arranged so as to be capable of providing adequate illumination of- (A) the operating controls of the installation; (B) the clock referred to in the last preceding paragraph; and (C) the card of instructions referred to in paragraph (e) of this regulation; and (iii) be controlled by two-way switches placed respectively near the entrance to the room or place from which the installation is operated and at the operating position and clearly labelled to indicate their purpose; (e) a card of instructions giving a clear summary of the radiotelephone procedure shall be displayed in full view of the radiotelephone operating position; and (f) if the radiotelephony installation is not installed in the place from which the ship is normally navigated, there shall be provided at the loudspeaker referred to in regulation 43 of these Regulations a manual gain control that, when adjusted to the minimum position, permits an output from the loudspeaker of sufficient volume for the maintenance of an effective listening watch.

NAVIGATION (RADIO) REGULATIONS - SECT. 42.
Provision of radiotelephone operators

42. A radiotelephone ship shall carry, as part of her crew, at least one wireless signaller or radio officer.

NAVIGATION (RADIO) REGULATIONS - SECT. 43.
Radio watch by radiotelephone

43. (1) Subject to the next succeeding sub-regulation, a continuous radio watch shall be maintained on a radiotelephone ship on each day while the ship is at sea by means of loudspeaker reception at the place from which the ship is normally navigated.

(2) The radio watch may be discontinued- (a) at any time, other than during silence periods, when the radiotelephone installation is being used on another frequency for communication in connexion with the business of the ship; or (b) the circumstances are such that maintenance of the radio watch would interfere with the safe navigation of the ship.

(3) Subject to the next succeeding sub-regulation, communication with coast radio stations shall be conducted by a radio officer or wireless signaller.

(4) Where the circumstances make it impracticable for such communication to be conducted by a radio officer or wireless signaller, the communication may be conducted by another person.

NAVIGATION (RADIO) REGULATIONS - SECT. 44.
Tests

44. (1) While a radiotelephone ship is at sea, the radio officer or, if the ship does not carry a radio officer as part of her crew, the wireless signaller shall test batteries which are a source of electrical energy for the radiotelephony installation by voltmeter at least once each week and by hydrometer at least once each month, the batteries being placed on normal load during voltage tests.

(2) The radio officer or wireless signaller, as the case may be, shall test the main radiotelephony installation and the reserve radiotelephony installation, if any, once during the passage of the ship between each port at which the ship calls by communicating with a coast station.

Penalty: One hundred dollars.

NAVIGATION (RADIO) REGULATIONS - SECT. 45.
Charging of batteries

45. Batteries, being a source of electrical energy for any part of the radiotelephony installation on a radiotelephone ship, that are found not to be fully charged shall be fully charged as soon as practicable.

NAVIGATION (RADIO) REGULATIONS - SECT. 46.
Entries to be made in official log-book

46. There shall be entered in the official log-book of a radiotele-phone ship- (a) particulars of the test referred to in sub-regulation (2) of regulation 44 of these Regulations; (b) particulars of all distress messages transmitted or received; and (c) the time at which listening watch is discontinued in accordance with the provisions of sub-regulation (2) of regulation 43 of these Regulations together with the reason for the discontinuance and the time at which watch is resumed.

NAVIGATION (RADIO) REGULATIONS - SECT. 47.
Radio officers

PART VI-QUALIFICATIONS OF RADIO OFFICERS AND WIRELESS SIGNALLERS

47. (1) A person is not entitled to be a radio officer on a ship registered in Australia or engaged in the coasting trade unless he holds- (a) a valid First Class Commercial Operator's Certificate of Proficiency, or a valid Second Class Commercial Operator's Certificate of Proficiency, issued and in force under the Wireless Telegraphy Regulations; or (b) a valid certificate issued and in force under a law of a Commonwealth country, being a certificate included in a class of certificates declared in writing by the Postmaster-General or by an officer authorized by the Postmaster-General to make declarations under this paragraph to be the equivalent of a First Class Commercial Operator's Certificate of Proficiency, or of a Second Class Commercial Operator's Certificate of Proficiency, issued under the Wireless Telegraphy Regulations.

(2) For the purposes of these Regulations, if- (a) at the date of his intended engagement, the periods of experience at sea in the operation of radio installations of the holder of a certificate referred to in sub-regulation (1) of this regulation during the period of two years immediately preceding that date do not amount in the aggregate to three months; and (b) the certificate was granted more than two years before that date, the certificate shall be deemed not to be valid unless the holder satisfies the Postmaster-General, by re-examination or otherwise, that he still possesses the qualifications described in the certificate.

(3) A person employed as a radio officer on a ship registered in Australia or engaged in the coasting trade shall, upon the request of a radio surveyor, produce his certificate of proficiency for inspection.

Penalty: One hundred dollars.

(4) A person is not qualified to be a radio officer on a ship not registered in Australia or engaged in the coasting trade unless he holds a certificate of proficiency or competence in wireless telegraphy issued and in force under a law of the country in which the ship is registered.

NAVIGATION (RADIO) REGULATIONS - SECT. 48.
Wireless signallers

48. (1) A person is not qualified to be a wireless signaller on a ship registered in Australia or engaged in the coasting trade unless he holds a valid Third Class Commercial Operator's Certificate of Proficiency with respect to radio equipment of the type or types installed in the ship issued and in force under the Wireless Telegraphy Regulations.

(2) For the purposes of the last preceding sub-regulation, if- (a) at the date of his intended engagement, the periods of experience at sea in the operation of radio installations of the holder of a certificate referred to in that sub-regulation during the period of two years immediately preceding that date do not amount in the aggregate to three months; and (b) the certificate was granted more than two years before that date, the certificate shall be deemed not to be valid unless the holder satisfies the Postmaster-General, by re-examination or otherwise, that he still possesses the qualifications described in the certificate.

(3) A person employed as a wireless signaller on a ship registered in Australia or engaged in the coasting trade shall, upon the request of a radio surveyor, produce his certificate of proficiency for inspection.

Penalty: One hundred dollars.

(4) For the purposes of these Regulations, a person is not qualified to be a wireless signaller on a ship not registered in Australia or engaged in the coasting trade unless he holds a certificate of proficiency or competence in wireless telephony issued and in force under a law of the country in which the ship is registered.

NAVIGATION (RADIO) REGULATIONS - SECT. 49.
Radiotelegraphy equipment installed before 1 July 1960

PART VII-TRANSITIONAL PROVISIONS

49. These Regulations do not require a ship equipped with radiotelegraphy equipment installed before the first day of July, 1960, to be equipped with a radiotelegraphy installation that complies with the requirements specified in the First Schedule or a radiotelephony installation that complies with the requirements specified in the Second Schedule if- (a) the radiotelegraphy equipment with which the ship is equipped complies with the requirements specified in paragaphs (a) and (b) of regulation 45 of the Navigation (Radio) Regulations as in force immediately before the commencement of these Regulations; (b) the ship is equipped with a reserve transmitter that complies with the requirements of these Regulations; (c) the ship is equipped with an automatic keying device; and (d) the ship is equipped with a main receiver capable of reception of waves of type A1 and type A2 on all frequencies between 405 kilocycles per second and 535 kilocycles per second and between 1605 kilocycles per second and 3000 kilocycles per second and with a reserve receiver that complies with the requirements of these Regulations.

NAVIGATION (RADIO) REGULATIONS - SECT. 50.
Auto-alarm wholly or partly installed before 20 March, 1968

Substituted by 1973 No. 121 r. 3 50. (1) Regulation 9 of these Regulations does not apply to- (a) an auto-alarm that- (i) was, immediately before the commencement of these Regulations, part of an installation in a ship that was an existing installation for the purposes of the Navigation (Radio) Regulations as in force at that time; and (ii) complies with the requirements of regulation 53 as in force at that time; or (b) an auto-alarm that- (i) is part of an installation in a ship that is an existing installation for the purpose of these Regulations but was not part of an installation referred to in sub-paragraph (i) of paragraph (a); and (ii) complies with the requirements of the Fifth Schedule to the Navigation (Radio) Regulations as in force immediately before the commencement of these Regulations or of the Fifth Schedule to these Regulations, and the ship shall, for the purpose of regulations 25 and 26, be deemed to be equipped with an auto-alarm.

(2) Sub-regulation (1) does not apply in relation to a ship that is engaged on an international voyage.

Regulation 51 repealed by 1978 No. 122 r. 3 * * * * * * * *

NAVIGATION (RADIO) REGULATIONS - SECT. 52.
Regulation 9 not to apply to existing installation

52. Regulation 9 of these Regulations does not apply in relation to equipment that is part of an existing installation.

Regulation 53 repealed by 1978 No. 122 r. 3 * * * * * * * *

NAVIGATION (RADIO) REGULATIONS - SECT. 54.
Existing installation on a radiotelephone ship

Sub-reg. (1) amended by 1973 No. 121 r. 4 54. (1) These Regulations do not require a ship equipped with a radiotelephony installation that is an existing installation to be fitted with a radiotelephony transmitter or a radiotelephony receiver that complies with Part 1 of the Second Schedule if the installation complies with the requirements of the Second Schedule to the Navigation (Radio) Regulations as in force immediately before the commencement of these Regulations and is capable of reception by means of high stability spot tuned circuits on frequencies of 2,182 kilocycles per second and 6,204 kilocycles per second.

Amended by 1972 No. 117 r. 1 (2) Subject to the succeeding provisions of this regulation, these Regulations do not require a ship equipped with a radiotelephony installation that is an existing installation to be fitted with a radiotelephony transmitter or a radiotelephony receiver that complies with the requirements of Part 1 of the Second Schedule if- (a) the transmitter of the installation is capable of- (i) transmission on 2,182 kilocycles per second, 6,204 kilocycles per second and one other frequency between 2,000 kilocycles per second and 2,850 kilocycles per second, with frequency accuracy of 0.005 per centum; (ii) power output to aerial (not including power dissipated in an aerial tuning inductor or other component forming part of the transmitter) of not less than 15 watts on any of the three frequencies referred to in the last preceding sub-paragraph; and (iii) in normal operation, a depth of modulation of at least 70 per centum at peak intensity; (b) the receiver of the installation is capable of- (i) reception on 2,000 kilocycles per second to 3,000 kilocycles per second and on 6,000 kilocycles per second to 6,525 kilocycles per second by continuous tuning or in steps of one kilocycle per second; or (ii) if it is not so capable and is installed on a ship not engaged on an international voyage-reception by means of high stability spot tuned circuits on not less than four frequencies between 2,000 kilocycles per second and 3,000 kilocycles per second and not less than three frequencies between 6,000 kilocycles per second and 6,525 kilocycles per second, and of producing clearly perceptible signals by means of a loud-speaker when the receiver input is as low as 25 microvolts; and (c) the transmitter and the receiver are installed in such a way as to permit rapid changeover from transmission to reception and from reception to transmission.

Amended by 1972 No. 117 r. 1 (3) Where the receiver of the radiotelephony installation in a ship referred to in the last preceding sub-regulation complies with the requirements set out in sub-paragraph (i) of paragraph (b) of that sub-regulation but not with the requirements set out in sub-paragraph (ii) of that paragraph, that sub-regulation ceases, after the expiration of a period of six months after the commencement of these Regulations, to have effect in relation to the ship unless the receiver, in addition to complying with the requirements set out in sub-paragraph (i) of that paragraph, is also capable of reception on 2,182 kilocycles per second and on 6,204 kilocycles per second by high stability spot tuned circuits capable of remaining within 2 parts in 10,000 of the frequency of tune.

(4) Sub-regulation (2) of this regulation ceases, after the expiration of a period of seven years after the commencement of these Regulations, to have effect in relation to any ship.

Added by 1973 No. 121 r. 4 (5) Where a ship is equipped with a radiotelephony installation- (a) that was wholly installed in the ship after the commencement of these Regulations but before 20th December, 1968; or (b) that, except for this sub-regulation, would not be an existing installation for the purpose of this regulation but is an installation part of which was installed in the ship before 20th December, 1968, and the remainder of which consists either of- (i) parts installed in replacement of identical parts; or (ii) parts which comply with the requirements of these Regulations, the ship shall, for the purpose of this regulation, be deemed to be equipped with a radiotelephony installation that is an existing installation for the purpose of this regulation.

Regulations 55 and 56 repealed by 1978 No. 122 r. 3; regulation 57 repealed by 1976 No. 224 * * * * * * * * -----------

NAVIGATION (RADIO) REGULATIONS - SCHEDULES

SCH

THE SCHEDULES FIRST SCHEDULE Regulation 7 RADIOTELEGRAPHY INSTALLATIONS DEFINITION 1. In this Schedule, unless the contrary intention appears, "the standard output" means- (a) in relation to the main receiver of a radiotelegraphy installation-1 milliwatt into a resistance substantially equal to the modulus of the impedance of the telephone receivers forming part of the receiver at 1,000 cycles per second; and (b) in relation to the reserve receiver of a radiotelegraphy installation- (i) for headphone reception-10 decibels below 1 milliwatt into a resistance substantially equal to the modulus of the impedance of the telephone receivers forming part of the receiver at 1,000 cycles per second; and (ii) for loudspeaker reception-17 decibels above 1 milliwatt into a resistance that loads the out-put stage with the load appropriate to the stage.

COMPONENTS 2. A radiotelegraphy installation shall include- (a) a main transmitter; (b) a main receiver; (c) a reserve transmitter; (d) a reserve receiver; and (e) an automatic keying device.

MAIN TRANSMITTER Operation 3. (1) Subject to the next succeeding sub-item, the main transmitter shall be capable of being operated from the supply of electrical energy referred to in sub-regulation (1) of regulation 20 of these Regulations and of being connected without delay with and tuned to the main and reserve aerials referred to in regulation 18 of these Regulations.

(2) The valve filaments in the main transmitter may, if approved in a particular case, be energized from batteries, not being batteries constituting the source of electrical energy referred to in sub-regulation (5) of regulation 20 of these Regulations.

Types of Waves 4. The main transmitter shall be capable of adjustment for the transmission of waves of both type A1 and type A2 in the frequency range 405 kilocycles per second to 525 kilocycles per second.

Transmitting Frequency 5. The main transmitter shall be capable of transmitting continuously, but not simultaneously, radiotelegraphy signals on the frequencies of 500 kilocycles per second, 410 kilocycles per second, 425 kilocycles per second and 512 kilocycles per second.

Range of Load Impedance 6. The main transmitter shall be capable of complying with all the requirements of this Schedule applicable to it when connected to an artificial load one side of which is earthed, and that consists of a resistance in series with a capacitance in each of the following combinations: (a) a resistance of 3.6 ohms in series with a capacitance of 300 picofarads; (b) a resistance of 2.8 ohms in series with a capacitance of 400 picofarads; (c) a resistance of 2.2 ohms in series with a capacitance of 500 picofarads; (d) a resistance of 2.0 ohms in series with a capacitance of 600 picofarads; and (e) a resistance of 1.9 ohms in series with a capacitance of 750 picofarads.

Power of Main Transmitter 7. (1) In this item, a reference to the power of the main transmitter is a reference to the total power developed in the artificial load referred to in the last preceding item during a period when the transmitting key is depressed.

(2) The maximum power of the main transmitter shall not, at any frequency within its range, be less than the prescribed number of watts.

(3) For the purposes of the last preceding sub-item the prescribed number of watts is the number calculated in accordance with the formula- 100 ------- 500 1+ -- f where f is the frequency in kilocycles per second at which the test is made.

(4) The main transmitter shall be so designed that its power can be reduced, either continuously or in steps of not more than 6 decibels, to not less than 2 watts and not more than 9 watts.

(5) The main transmitter shall, when adjusted to develop its maximum rated power, be capable of- (a) continuous operation for the transmission of radiotelegraphy signals at any speed up to 30 bauds; and (b) operation under steady marking or spacing conditions for a period of not less than 15 minutes.

Depth of Modulation 8. When the main transmitter is transmitting waves of type A2, the depth of modulation shall be- (a) when the power of the main transmitter is not less than 25 watts-not less than 80 per centum and not more than 95 per centum; and (b) when the power of the main transmitter is less than 25 watts-not less than 70 per centum and not more than 95 per centum.

Note Frequency 9. The note frequency of the main transmitter shall be not less than 500 cycles per second and not more than 1,200 cycles per second.

Speed of Transmission 10. The main transmitter shall be capable of transmitting radiotelegraphy signals at all speeds up to 30 bauds without critical relay adjustment.

Frequency Stability 11. The main transmitter shall be capable of maintaining a frequency tolerance of plus or minus 0.1 per centum throughout every transmission without adjustment of controls, notwithstanding- (a) variations of the impedance of the aerial or other load to which it is connected; (b) variations of supply voltage not exceeding plus or minus 10 per centum; or (c) variations of the kind referred to in paragraph (a) of this item occurring at the same time as variations of the kind referred to in paragraph (b) of this item.

Spurious and Harmonic Components in Output Signal 12. (1) The radio-frequency output of the main transmitter shall be free from frequency components due to spurious oscillations in any part of the transmitter.

(2) The maximum power output of the transmitter at any harmonic of the radio-frequency shall not exceed 20 milliwatts, whether waves of type A1 or type A2 are being transmitted.

(3) When the main transmitter is transmitting dots at a speed of 30 bauds, 95 per centum of the total power from the transmitter shall be radiated within plus or minus 100 cycles per second of the steady-state carrier frequency for waves of type A1 and within plus or minus 2,500 cycles per second of the steady-state carrier frequency for waves of type A2.

Operating Facilities 13. (1) The main transmitter shall be so arranged that one operator can carry out in not more than 10 seconds all adjustments necessary to change it from operation on any one of the frequencies specified in item 5 of this Schedule to operation on any other of those frequencies.

(2) The main transmitter shall be capable of being operated on full power within 60 seconds after any part of it has been switched on.

(3) If the main transmitter is so designed and constructed that it is necessary to delay the application of certain voltages for a period after it has been switched on, the delay shall be provided automatically.

(4) The main transmitter shall be provided with a device that, when the transmitting key is not depressed, automatically brings into operation the main receiver in conjunction with which the transmitter is operated and means shall be provided for suppressing interference with reception caused by the transmitter.

(5) The main transmitter shall be capable of being used in conjunction with an automatic keying device.

Protective Arrangements 14. (1) The main transmitter shall be so designed and constructed that when the transmitting key is depressed the aerial can be disconnected or the output can be short-circuited without damage being caused to the transmitter.

(2) Means shall be provided for protecting the main transmitter from damage caused by excessive current or voltage.

Crystal Holders 15. If the main transmitter is designed for use with piezo-electric crystals, it shall be capable of being used with a piezo-electric crystal unit conforming to an approved specification.

Artificial Aerial 16. (1) An artificial aerial suitable for testing the main transmitter on full power shall be provided.

(2) The artificial aerial shall include an indicator or lamp to indicate the passage of radio-frequency currents.

Aerial Ammeter 17. The main transmitter shall be provided with an aerial ammeter.

MAIN RECEIVER General 18. (1) The main receiver may consist of a single unit or of separate units each of which is capable of reception on a section or sections of the frequency range specified in the next succeeding item.

(2) The main receiver or, if it is not a single unit, each unit of the main receiver shall be capable of being connected without delay to the main and reserve aerials referred to in regulation 18 of these Regulations.

(3) Each unit of the main receiver shall bear a plate stating the frequency range which the unit is intended to cover.

(4) The main receiver shall not be constructed for operation, in whole or in part, from energy supplied by dry batteries.

(5) If a vibrator power-unit is used, a stand-by vibrator so arranged that it may be switched into circuit immediately shall be provided.

Frequency Range and Types of Waves 19. (1) In the case of a ship engaged on an international voyage, the main receiver shall be capable of- (a) receiving signals of type A1 and type A2 within the frequency range 380 kilocycles per second to 535 kilocycles per second; and (b) receiving signals of type A1, type A2 and type A3 within the frequency range 1,605 kilocycles per second to 25 megacycles per second.

(2) In the case of a ship not engaged on an international voyage, the main receiver shall be capable of receiving signals of type A1, type A2 and type A3 within the frequency ranges 380 kilocycles per second to 535 kilocycles per second and 1,605 kilocycles per second to 3,000 kilocycles per second.

Reception Facilities 20. The main receiver shall be capable of headphone reception at all frequencies within the frequency ranges specified in sub-item (1) or sub-item (2), as the case may be, of the last preceding item.

Controls 21. (1) The main receiver shall have- (a) separate radio-frequency and audio-frequency gain controls; (b) means for reducing the receiver gain when the transmitting key of the transmitter is depressed so that signals may be heard without inconvenience to the operator or damage to the receiver when the transmitter is keyed at signalling speeds of up to 30 words per minute; (c) a switch for disconnecting the device, if any, for reducing the effect of impulsive noise signals; (d) tuning controls which permit- (i) rapid tuning throughout the frequency range covered by the receiver; and (ii) fine tuning, by bandspread or otherwise, controlled by a knob of at least 2 inches diameter the backlash of which does not exceed 1 degree and that is so geared that, after backlash has been taken up, a rotation of 1 degree does not change the frequency of tune by more than 3 parts in 10,000 in the frequency range 380 kilocycles per second to 535 kilocycles per second or by more than 1 part in 10,000 in the frequency range 1,605 kilocycles per second to 25 megacycles per second; (e) accurate means of resetting tune; and (f) a scale for use with the means of rapid tuning.

(2) If a logging scale is provided as the means of resetting tune, it shall be such that 1 inch on the scale corresponds to a frequency change of not more than 1 per centum.

(3) The scale for use with the means of rapid tuning shall, unless calibration charts are provided for use with the scale, be calibrated directly in frequency.

Conditions of Testing 22. For the purposes of the tests referred to in items 23 to 35 (inclusive) of this Schedule, the following conditions shall, unless the contrary intention appears in any particular item, apply: (a) an artificial aerial shall be used for the test and shall consist of a 75 ohm non-inductive resistor if the test is conducted at frequencies above 4 megacyles per second, and a 10 ohm resistor in series with a capacitor having a value of not less than 200 picofarads or more than 600 picofarads if the test is conducted at any other frequencies; (b) signals of type A2 used in the test shall be modulated to a depth of 30 per centum and shall have a note frequency of 400 cycles per second; and (c) the frequency of the interfering or unwanted signals applied during the test shall not be restricted to the frequency range of the receiver.

Selectivity 23. (1) The selectivity preceding the final detector of the main receiver shall be variable, either continuously or in steps, and shall, throughout the frequency ranges respectively specified in column 1 of the following table, and at the bandwidth settings respectively specified in column 2 of that table, satisfy the requirements specified in column 3 of that table in relation to those frequency ranges and bandwidths: ------------------------------------------------------------------------------ -- Column 1 Column 2 Column 3 Bandwidth Frequency range setting Selectivity requirements ------------------------------------------------------------------------------ -- 1,605 kilocycles per second to 25 megacycles per second Wide 1. Discrimination not exceeding 6 decibels to be obtained at frequencies removed from tune by 4 kilocycles per second 2. Discrimination of not less than 30 decibels to be obtained at frequencies removed from tune by 12 kilocycles per second 3. Discrimination of not less than 60 decibels to be obtained at frequencies removed from tune by 24 kilocycles per second 4. Discrimination of not less than 90 decibels to be obtained at frequencies removed from tune by 50 kilocycles per second, except that discrimination of 60 decibels is sufficient against an interfering signal of a frequency exceeding 1.5 megacycles per second 380 kilocycles per second to 25 megacycles per second Intermediate 1. Discrimination not exceeding 6 decibels to be obtained at frequencies removed from tune by 1.5 kilocycles per second 2. Discrimination of not less than 30 decibels to be obtained at frequencies removed from tune by 6 kilocycles per second 3. Discrimination of not less than 60 decibels to be obtained at frequencies removed from tune by 12 kilocycles per second 4. Discrimination of not less than 90 decibels to be obtained at frequencies removed from tune by 35 kilocycles per second, except that discrimination of 60 decibels is sufficient against an interfering signal of a frequency exceeding 1.5 megacycles per second 380 kilocycles per second to 25 megacycles per second Narrow 1. Discrimination not exceeding 6 decibels to be obtained at frequencies removed from tune by 0.5 kilocycles per second 2. Discrimination of not less than 30 decibels to be obtained at frequencies removed from tune by 2.5 kilocycles per second 3. Discrimination of not less than 60 decibels to be obtained at frequencies removed from tune by 5 kilocycles per second 4. Discrimination of not less than 90 decibels to be obtained at frequencies removed from tune by 25 kilocycles per second, except that discrimination of 60 decibels is sufficient against an interfering signal of a frequency exceeding 1.5 megacycles per second ------------------------------------------------------------------------------ -- (2) If the receiver is a superheterodyne receiver, the image response ratio of the receiver shall, where the frequency of wanted signals is as specified in column 1 of the following table, be not less than the ratio specified in column 2 of that table opposite the reference to the frequency in column 1: ------------------------------------------------------------------------------ -- Column 1 Column 2 Frequency of wanted signal Image response ratio ------------------------------------------------------------------------------ -- Not less than 380 kilocycles per second but not exceeding 535 kilocycles per second . . . . . . . . . . . . . . . . 80 decibels Not less than 1,605 kilocycles per second but not exceeding 7 megacycles per second . . . . . . . . . . . . 60 decibels Exceeding 7 megacycles per second but not exceeding 15 megacycles per second . . . . . . . . . . . . . . . . . . 40 decibels Exceeding 15 megacycles per second . . . . . . . . . . . . 25 decibels ------------------------------------------------------------------------------ -- (3) If the receiver is a superheterodyne receiver, the intermediate frequency response ratio shall- (a) be not less than 90 decibels at intermediate frequencies being not less than 140 kilocycles per second and not more than 1,600 kilocycles per second; and (b) be not less than 60 decibels at any other intermediate frequency.

Sensitivity 24. The standard output of the main receiver shall be obtained at all frequencies specified in column 1 of the following table and at all bandwidth settings and both when the automatic gain control is on and off, with an input not exceeding that specified in column 2 of that table opposite the reference to the frequency in column 1 in the case of type A1 signals, or that specified in column 3 of that table opposite the reference to the frequency in column 1 in the case of type A2 signals: ------------------------------------------------------------------------------ -- Column 1 Column 2 Column 3 Maximum input- Maximum input- Frequency type A1 signals type A2 signals ------------------------------------------------------------------------------ -- Not less than 380 kilocycles per second but not exceeding 535 kilocycles per second 20 decibels above 1 microvolt 30 decibels above 1 microvolt Not less than 1,605 kilocycles per second but not exceeding 10 megacycles per second 10 decibels above 1 microvolt 20 decibels above 1 microvolt Exceeding 10 megacycles per second but not exceeding 25 megacycles per second 20 decibels above 1 microvolt 30 decibels above 1 microvolt ------------------------------------------------------------------------------ -- Signal to Noise Ratio 25. (1) The signal to noise ratio of the main receiver shall, at any frequency specified in column 1 of the following table and at the bandwidth setting specified in column 2 of that table opposite the reference to the frequency in column 1, be not less than the ratio specified in column 3 of that table opposite the reference to the frequency in column 1 when receiving any signal of type A1 or type A2 of the relevant maximum input specified in the table in the last preceding item with the receiver gain adjusted to give the standard output: ------------------------------------------------------------------------------ -- Column 1 Column 2 Column 3 Signal to Frequency Bandwidth setting noise ratio ------------------------------------------------------------------------------ -- Not less than 380 kilocycles per second but not exceeding 535 kilocycles per second Intermediate . . 10 decibels Not less than 1,605 kilocycles per second but not exceeding 4 megacycles per second Wide . . . . . . 10 decibels Exceeding 4 megacycles per second but not exceeding 10 megacycles per second Wide . . . . . . 20 decibels Exceeding 10 megacycles per second but not exceeding 25 megacycles per second Wide . . . . . . 25 decibels ------------------------------------------------------------------------------ -- (2) For the purposes of this item, spurious whistles shall be deemed to be noise.

Automatic Gain Control 26. (1) The main receiver shall be provided with an automatic gain control capable of operating efficiently on waves of type A1, type A2 and type A3 of all frequencies not less than 380 kilocycles per second or more than 25 megacycles per second and of being switched out of circuit.

(2) The automatic gain control shall be such that, when the receiver is adjusted to give the standard output with an input signal of type A2 that is 10 decibels above the relevant maximum input specified in the table in item 24 of this Schedule on any frequency not less than 1,605 kilocycles per second or more than 25 megacycles per second- (a) an increase in input of 20 decibels results in an improvement in the signal to noise ratio of at least 15 decibels; and (b) an increase in input of 60 decibels does not increase the output by more than 10 decibels.

(3) The charge time constant of the automatic gain control system shall be between 0.05 second and 0.2 second and the discharge time constant shall be between 0.5 second and 2 seconds.

Output Limiting 27. An increase in the input to the main receiver of 60 decibels when- (a) the automatic gain control is switched off; and (b) the receiver is adjusted to give the standard output with an input signal of type A1 20 decibels above the relevant maximum input specified in the table in item 24 of this Schedule, shall not increase the output by more than 10 decibels.

Blocking 28. The change in the output of the main receiver shall not exceed 3 decibels when- (a) the bandwidth is set at "intermediate "; (b) the automatic gain control is in operation; (c) the receiver is adjusted to give the standard output with an input wanted signal of type A2 at a level of 60 decibels above 1 microvolt and of any frequency not less than 380 kilocycles per second or more than 25 megacycles per second; and (d) an input signal of type A1 at a level of 100 decibels above 1 microvolt and at a frequency of 10 kilocycles per second above or below the wanted frequency is then simultaneously applied.

Cross Modulation 29. The main receiver shall not produce an output of level higher that 30 decibels below the standard output when- (a) the bandwidth is set at "intermediate "; (b) the automatic gain control is in operation; (c) the receiver is adjusted to give the standard output with an input wanted signal of type A2 at a level of 60 decibels above 1 microvolt and of any frequency not less than 380 kilocycles per second or more than 25 megacycles per second; (d) the modulation of the signal is switched off; and (e) an input signal of type A2 at a level of 90 decibels above 1 microvolt and at a frequency 10 kilocycles per second above or below the wanted frequency is then applied.

Intermodulation and Harmonic Production 30. An output exceeding the standard output shall not be produced by the main receiver- (a) when- (i) the bandwidth is set at "intermediate "; (ii) the automatic gain control is switched off; (iii) the receiver is adjusted to give the standard output with an input wanted signal of type A2 at a level of 30 decibels above 1 microvolt and at any frequency not less than 380 kilocycles per second or more than 535 kilocycles per second; (iv) the input wanted signal has been removed; and (v) two unwanted signals, one of type A1 and the other of type A2 of which the frequency difference or frequency sum is the same as the frequency of the wanted signal and each of which is of a level of 110 decibels above 1 microvolt and of such a frequency as to give no appreciable output when applied alone, are then simultaneously applied; or (b) when- (i) the bandwidth is set at "intermediate "; (ii) the automatic gain control is switched off; (iii) the receiver is adjusted to give the standard output with an input wanted signal of type A2 at a level of 30 decibels above 1 microvolt and at any frequency not less than 380 kilocycles per second or more than 535 kilocycles per second; (iv) the input wanted signal has been removed; and (v) a signal of type A2 of a level of 116 decibels above 1 microvolt and of a frequency one-half of that of the wanted signal is applied.

Fidelity 31. (1) The maximum change in level of the output of the main receiver shall be less than 8 decibels while the modulation frequency of an input signal of constant level and modulation depth is varied continuously from 300 cycles per second to 2,500 cycles per second when the bandwidth is set at "wide" for the reception of waves of type A3 having a frequency above 1,605 kilocycles per second.

(2) The main receiver shall comply with the requirement of the last preceding sub-item when the level and modulation depth of the input signal are such that the output of the receiver does not exceed the standard output.

Non-linear Distortion 32. With the automatic gain control switched on, the total harmonic content of the audio-frequency output of the main receiver at any output not exceeding the standard output shall not exceed- (a) 5 per centum with an input signal of a frequency of 500 kilocycles per second at any level between 30 decibels and 80 decibels above 1 microvolt and sinusoidally modulated to a depth of 30 per centum at 400 cycles per second; or (b) 15 per centum with such an input signal modulated to a depth of 80 per centum at 400 cycles per second.

Tuning Drift and Stability 33. The turning drift and stability of the main receiver shall comply with the following requirements: (a) after the receiver has been switched on for 5 minutes, the changes of tune frequency during any period of 5 minutes shall not exceed, within a frequency range specified in column 1 of the following table, the value specified in column 2 of that table opposite the reference to the frequency range in column 1: ------------------------------------------------------------------------ Column 1 Column 2 Frequency range Maximum change ------------------------------------------------------------------------ 380 kilocycles per second to 535 kilocycles per second . . . . . . . . . . . . . . . . . . . . . . . 3 parts in 10,000 1,605 kilocycles per second to 25 megacycles per second . . . . . . . . . . . . . . . . . . . . . . . 1 part in 10,000 ------------------------------------------------------------------------ (b) a change of 5 per centum in any one of the supply voltages to the receiver shall not produce, within a frequency range specified in column 1 of the following table, a maximum change of tune frequency exceeding the value specified in column 2 of that table opposite the reference to the frequency range in column 1: ------------------------------------------------------------------------ Column 1 Column 2 Frequency range Maximum change ------------------------------------------------------------------------ 380 kilocycles per second to 535 kilocycles per second . . . . . . . . . . . . . . . . . . . . . . . 3 parts in 10,000 1,605 kilocycles per second to 25 megacycles per second . . . . . . . . . . . . . . . . . . . . . . . 1 part in 10,000 ------------------------------------------------------------------------ (c) a change in ambient temperature of 5 degrees Centigrade within the range of 0 degrees Centigrade to 50 degrees Centigrade applied after the receiver has been switched on for 1 hour shall not produce, within a frequency range specified in column 1 of the following table, a maximum change of tune frequency exceeding the value specified in column 2 of that table opposite the reference to the frequency range in column 1: ------------------------------------------------------------------------ Column 1 Column 2 Frequency range Maximum change ------------------------------------------------------------------------ 380 kilocycles per second to 535 kilocycles per second . . . . . . . . . . . . . . . . . . . . . . . 10 parts in 10,000 1,605 kilocycles per second to 25 megacycles per second . . . . . . . . . . . . . . . . . . . . . . . 3 parts in 10,000 ------------------------------------------------------------------------ Heterodyne Note Stability 34. The heterodyne note stability of the main receiver shall be such that- (a) the frequency of a heterodyne note that is initially 1 kilocycle per second shall not vary by more than 100 cycles per second when the input level referred to in paragraph (b) of item 27 of this Schedule is increased by not more than 60 decibels; and (b) it is possible at all input levels within the range specified in the last preceding paragraph to obtain a beat note of 200 cycles per second when tuning either towards or away from zero beat.

Radiation 35. (1) When the main receiver is in use, it shall not produce a field exceeding 0.1 microvolt per metre when measured at a distance of 1 mile from the receiver.

(2) The receiver shall be deemed to comply with the requirements of the last preceding sub-item if, in the circumstances set out in the following paragraphs, the power measured by the measuring instrument does not exceed 4 x 10*-10* watts, whatever the resistance of the measuring instrument or the adjustment of the receiver and notwithstanding that the search coil is short-circuited or moved in any way other than a way that causes it to approach within 6 inches of the receiver case: (a) the receiver is placed centrally in a screened earthed enclosure at least 6 feet cube; (b) the earth terminal of the receiver is connected to the inside of the screen; (c) the aerial terminal of the receiver is connected through an unscreened four-turn rectangular search coil 1 foot square situated within the enclosure and an unscreened lead to a resistive measuring instrument mounted outside the enclosure and having its other terminal earthed; (d) the receiver is energized; and (e) if the receiver is capable of headphone reception, unscreened headphones are connected to it.

RESERVE TRANSMITTER General 36. The reserve transmitter shall be provided with such equipment as is necessary to enable it to operate from the source of electrical energy referred to in sub-regulation (5) of regulation 20 of these Regulations and shall be capable of being connected without delay with and tuned to the main and reserve aerials referred to in regulation 18 of these Regulations.

Types of Waves and Frequency Range 37. The reserve transmitter shall be capable of transmitting continuously waves of type A2 on the frequency of 500 kilocycles per second.

Source of Energy 38. (1) The reserve transmitter shall be capable of operation from the source of energy referred to in sub-regulation (5) of regulation 20 of these Regulations.

(2) If a vibrator power unit is employed, a standby vibrator so arranged that it may be immediately switched into circuit shall be provided.

Range of Load Impedance 39. The reserve transmitter shall be capable of complying with all the requirements of this Schedule applicable to it when connected to an artificial load one side of which is earthed and that consists of a resistance in series with a capacitance in each of the following combinations: (a) a resistance of 4 ohms in series with a capacitance of 250 picofarads; (b) a resistance of 3.6 ohms in series with a capacitance of 300 picofarads; (c) a resistance of 2.8 ohms in series with a capacitance of 400 picofarads; (d) a resistance of 2.2 ohms in series with a capacitance of 500 picofarads; (e) a resistance of 2 ohms in series with a capacitance of 600 picofarads; and (f) a resistance of 1.9 ohms in series with a capacitance of 750 picofarads.

Power of Reserve Transmitter 40. (1) For the purposes of this item, the power of the reserve transmitter shall be deemed to be the mean power developed in the artificial load during a period when the transmitting key is depressed.

(2) The power of the reserve transmitter shall be not less than 15 watts when the source of energy is developing 90 per centum of its rated voltage.

(3) When adjusted to develop its maximum power, the reserve transmitter shall be capable of- (a) continuous operation for the transmission of telegraph signals at any speed up to 25 bauds; and (b) operation under steady marking or steady spacing conditions for a period of not less than 15 minutes.

Modulation 41. (1) The carrier wave shall be modulated to a depth of not less than 75 per centum or more than 100 per centum.

(2) The harmonic content of the modulating envelope shall not exceed 30 per centum.

Note Frequency 42. The note frequency of the reserve transmitter shall be not less than 500 cycles per second and not more than 1,200 cycles per second.

Speed of Transmission 43. The reserve transmitter shall be capable of transmitting telegraph signals at all speeds up to 25 bauds without critical adjustment of relays.

Frequency Stability 44. The reserve transmitter shall be capable of maintaining a frequency tolerance of plus or minus 0.5 per centum throughout every transmission without adjustment of controls notwithstanding variations of the impedance of the aerial or of any other load to which it is connected or variations of supply voltage not exceeding plus or minus 10 per centum.

Operating Facilities 45. (1) The reserve transmitter shall be capable of being operated on full power within 6 seconds after it has been switched on.

(2) The reserve transmitter shall be capable of being used in conjunction with the automatic keying device referred to in this Schedule.

Protective Arrangements 46. (1) The reserve transmitter shall be so designed and constructed that, when it is adjusted to develop its maximum power and the transmitting key is depressed, the aerial can be disconnected or the output can be short-circuited without damage being caused to any part of the transmitter.

(2) Means shall be provided for protecting the reserve transmitter from damage caused by excessive current or voltage.

Crystal Holders 47. If the reserve transmitter is designed for use with piezo-electric crystals, it shall be capable of being used with a piezo-electric crystal unit conforming to a specification approved for the purposes of item 15 of this Schedule.

Artificial Aerial 48. (1) An artificial aerial suitable for testing the reserve transmitter on full power shall be provided.

(2) The artificial aerial shall include an indicator or lamp to indicate the passage of radio-frequency currents.

Aerial Ammeter 49. The reserve transmitter shall be provided with an aerial ammeter.

Use for Normal Communications 50. If the reserve transmitter is used otherwise than in an emergency or for the tests required by paragraph (b) of sub-regulation (4) of regulation 28 of these Regulations, items 5, 8, 10, 11, 12 and 13 of this Schedule shall apply in relation to it as if it were the main transmitter.

RESERVE RECEIVER Connexion to Aerials 51. The reserve receiver shall be capable of being connected without delay to the main aerial or to the reserve aerial referred to in regulation 18 of these Regulations.

Frequency Range and Types of Waves 52. Subject to the next succeeding item, the reserve receiver shall be capable of receiving waves of type A2 throughout the frequency range from and including 488 kilocycles per second to and including 513 kilocycles per second and a wide band-pass shall be provided for that purpose.

Reception Facilities 53. The reserve receiver shall be capable of headphone reception and loudspeaker reception throughout the frequency range specified in the last preceding item, unless two reserve receivers are provided, one being capable of headphone reception, with or without tuning, throughout that range and the other of loudspeaker reception throughout that range without tuning.

Source of Energy 54. (1) The reserve receiver shall be capable of operation both from the supply of electrical energy referred to in sub-regulation (1) of regulation 20 of these Regulations and the source of electrical energy referred to in sub-regulation (5) of that regulation.

(2) If the ship is equipped with two reserve receivers complying with the requirements referred to in item 53 of this Schedule, the receiver capable of loudspeaker reception is not required to be capable of operation from the reserve source of electrical energy.

(3) The reserve receiver shall comply with the requirements of items 57 to 65 (inclusive) of this Schedule notwithstanding variations in the supply voltage not exceeding- (a) plus 5 per centum or minus 10 per centum of the nominal voltage when operated from the reserve source of electrical energy; or (b) plus 10 per centum or minus 10 per centum of the nominal voltage when operated from the main source of electrical energy.

(4) If a vibrator power unit is employed, a standby vibrator so arranged that it may be switched into circuit immediately shall be provided.

Controls 55. The reserve receiver shall be provided with- (a) a manual gain control; (b) if only a single reserve receiver is provided, a switch for changing the receiver from operation from the main source of electrical energy to the reserve source of electrical energy; and (c) if the receiver is designed to tune to frequencies additional to the frequency range specified in item 52 of this Schedule, a switch for changing reception to the frequency range so specified.

Conditions of Testing 56. For the purposes of the tests referred to in items 57 to 65 (inclusive) of this Schedule, the following conditions shall, unless the contrary intention appears in any particular item, apply: (a) an artificial aerial shall be used for the test and shall consist of a 10 ohm resistor in series with a capacitor having a value of not less than 200 picofarads or more than 600 picofarads; and (b) signals of type A2 used in the test shall be modulated to a depth of 30 per centum and shall have a note frequency of 400 cycles per second.

Selectivity 57. (1) Subject to the next succeeding sub-item, the selectivity preceding the final detector of the reserve receiver shall, if it is provided with a wide band-pass, satisfy the following requirements at the relative frequencies specified: (a) not more than 4 decibels discrimination relative to the maximum response shall be obtained at frequencies not less than 488 kilocycles per second or more than 513 kilocycles per second; (b) not less than 30 decibels discrimination relative to the maximum response shall be obtained at frequencies less than 475 kilocycles per second or more than 525 kilocycles per second; (c) not less than 60 decibels discrimination relative to the maximum response shall be obtained at frequencies less than 450 kilocycles per second or more than 550 kilocycles per second; and (d) not less than 90 decibels discrimination relative to the maximum response shall be obtained at frequencies less than 400 kilocycles per second or more than 600 kilocycles per second.

(2) If the receiver is a superheterodyne receiver, the intermediate frequency response ratio shall be not less than 60 decibels when the intermediate frequency is outside the limits 140 kilocycles per second to 1,600 kilocylces per second.

(3) If the receiver, being a receiver capable of headphone reception, is tunable over the frequency range specified in item 52 of this Schedule, the selectivity preceding the final detector at all frequencies within that range shall satisfy the following requirements: ------------------------------------------------------------------------------ -- Discrimination Corresponding bandwidth ------------------------------------------------------------------------------ -- 10 decibels . . . . . . . . . . . . . Not less than 4 kilocycles per second 30 decibels . . . . . . . . . . . . . Not more than 50 kilocycles per second 60 decibels . . . . . . . . . . . . . Not more than 100 kilocycles per second More than 60 decibels . . . . . . . . More than 100 kilocycles per second ------------------------------------------------------------------------------ -- Sensitivity 58. The standard output shall be obtained with an input signal of type A2 not exceeding 40 decibels above 1 microvolt.

Signal to Noise Ratio 59. The signal to noise ratio with an input signal of type A2 of 40 decibels above 1 microvolt and when the manual gain control is adjusted to give the standard output shall be not less than 20 decibels.

Blocking 60. If the reserve receiver is intended for loudspeaker reception, the change in the output of the receiver shall not exceed 3 decibels when- (a) the receiver is adjusted to give the standard output with an input wanted signal of type A2 at a level of 60 decibels above 1 microvolt and of the frequency of 500 kilocycles per second; and (b) an input signal of type A1 at a level of 100 decibels above 1 microvolt and of the frequency of 440 kilocycles per second or 560 kilocycles per second is then applied simultaneously.

Cross Modulation 61. If the reserve receiver is intended for loudspeaker reception, the receiver shall not produce an output of level higher than 30 decibels below the standard output when- (a) the receiver is adjusted to give the standard output with an input wanted signal of type A2 at a level of 60 decibels above 1 microvolt and of the frequency of 500 kilocycles per second; (b) the modulation of the signal is switched off; and (c) a signal of type A2 at a level of 90 decibels above 1 microvolt and of the frequency of 425 kilocycles per second or 575 kilocycles per second is then applied.

Intermodulation and Harmonic Production 62. If the reserve receiver is intended for loudspeaker reception, an output exceeding the standard output shall be produced by the receiver when- (a) the receiver is adjusted to give the standard output with an input wanted signal of type A2 at a level of 40 decibels above 1 microvolt and of the frequency of 500 kilocycles per second; (b) the input wanted signal has been removed; and (c) either- (i) Any two interfering signals, one of type A1 and the other of type A2, the frequency sum or difference of which is 500 kilocycles per second and each of which is at a level of 110 decibels above 1 microvolt and of such frequency as to give no appreciable output when applied alone are then simultaneously applied; or (ii) a signal of type A2 at a level of 116 decibels above 1 microvolt and of the frequency of 250 kilocycles per second is applied.

Reduction of Gain 63. If the reserve receiver is intended for loudspeaker reception, the receiver shall be provided with an efficient and automatic means of reducing the gain during the reception of strong signals.

Tuning Drift and Stability 64. The tuning drift and the stability of the emergency receiver shall be such that, within 5 minutes after the receiver is switched on, the requirements of item 57 of this Schedule are met.

Fidelity 65. (1) The fidelity of the reserve receiver shall be such that a change in the audio-frequency output shall be less than 8 decibels when the modulation frequency of the input signal is varied continuously from 400 cycles per second to 1,400 cycles per second, the level and modulation depth of the input signal being kept constant.

(2) For the purposes of the last preceding sub-item, the input signal may have any level and depth of modulation provided that the output of the receiver does not exceed the standard output.

Radiation 66. (1) The reserve receiver when in use shall not produce a field exceeding 0.1 microvolt per metre when measured at a distance of 1 mile from the receiver.

(2) The receiver shall be deemed to comply with the requirements of the last preceding sub-item if, in the circumstances set out in the following paragraphs, the power measured by the measuring instrument does not exceed 4 x 10*-10* watts, whatever the resistance of the measuring instrument or the adjustment of the receiver and notwithstanding that the search coil is short-circuited or moved in any way other than a way that causes it to approach within 6 inches of the receiver case: (a) the receiver is placed centrally in a screened earthed enclosure at least 6 feet cube; (b) the earth terminal of the receiver is connected to the inside of the screen; (c) the aerial terminal of the receiver is connected through an unscreened four turn rectangular search coil 1 foot square situated within the enclosure and an unscreened lead to a resistive measuring instrument mounted outside the enclosure and having its other terminal earthed; (d) the receiver is energized; and (e) if the receiver is capable of headphone reception, unscreened headphones are connected to it.

Automatic Keying Device 67. (1) The automatic keying device shall be capable- (a) of being connected in place of the manual transmitting key by a jack or other efficient means to- (i) the main transmitter; (ii) the reserve transmitter; and (iii) the auto-alarm test signal generator referred to in item 1 of the Fifth Schedule; and (b) when connected to any of the equipment specified in the last preceding paragraph- (i) of keying automatically the alarm signal specified in item 69 of this Schedule and, immediately after so doing, stopping and opening the keying circuit unless re-set or re-wound; and (ii) of keying automatically the distress call specified in item 70 of this Schedule in such manner that, if the device is used without attention, the automatic keying of the distress call will be repeated once every 12 minutes.

(2) The device shall not be capable of keying a signal other than a signal specified in item 69 or 70 of this Schedule.

68. (1) When switched out of circuit after transmission of the distress call, the automatic keying device shall be capable of being re-set by automatic or manual means so that, after the device has again been switched into circuit, keying shall commence within 10 seconds after the beginning of the distress call.

(2) If the re-setting is by manual means, the device shall include a means for indicating when re-setting is necessary.

69. For the purposes of sub-paragraph (i) of paragraph (b) of sub-item (1) of item 67 of this Schedule, the alarm signal is 12 dashes each of 4 seconds' duration separated by spaces of 1 second, the length of the dashes and spaces between being maintained within a tolerance of plus or minus 0.2 second.

70. (1) For the purposes of sub-paragraph (ii) of paragraph (b) of sub-item (1) of item 67 of this Schedule, the distress call consists of the following signals in the following order: (a) the distress signal (that is to say, the morse characters for the letters "SOS" transmitted as a single signal) repeated three times; (b) the morse characters for the word "DE "; (c) the morse characters for the ship's call sign repeated three times; and (d) the long dash having a duration of at least 20 seconds or two dashes each of 10 to 15 seconds duration.

(2) The characters of the distress signal shall be keyed at a speed of not more than 16 words per minute, the duration of the long dash shall be not less than 20 seconds and the total length of the distress call shall not exceed 90 seconds.

71. If the automatic keying device is electrically operated, the source of electrical energy by which it is operated shall be the source of electrical energy referred to in sub-regulation (5) of regulation 20 of these Regulations.

ADDITIONAL SAFEGUARDS TO BE INCORPORATED WHEN THE EQUIPMENT INCLUDES SEMI-CONDUCTOR DEVICES 72. Where semi-conductor devices are incorporated in the equipment, the following requirements shall be met: (a) the maker's maximum ratings for each type of semi-conductor device shall not, in any respect, be disregarded, and, in particular, the recommended junction temperature shall not be exceeded; (b) adequate screening and filtering shall be provided to protect the devices from damage due to radio-frequency energy; and (c) the devices shall be effectively protected from damage due to- (i) transient changes in power supply voltages; (ii) accidental reversal of power supply polarity; and (iii) a sustained increase in power supply voltage of 25 per centum relative to the nominal battery voltage when the equipment is operated from a battery of secondary cells.

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NAVIGATION (RADIO) REGULATIONS - SCHEDULE 2

Amended by 1972 No. 117 r. 2; 1973 No. 121 r. 5

SCH

SCHEDULE 2 Regulation 8 PART 1 MAIN RADIOTELEPHONY INSTALLATION GENERAL Definitions 1. In this Part- "the equipment" includes the transmitter and receiver and all other equipment necessary for the operation of the installation, but does not include an aerial; "the standard output ", in relation to a receiver, means- (a) for loudspeaker reception-50 milliwatts into a resistance that loads the output stage with the load appropriate to the stage; and (b) for telephone receiver reception where provided for-1 milliwatt into a resistance substantially equal to the modulus of the impedance of the telephone receivers at 1,000 cycles per second.

Components 2. A radiotelephony installation shall include- (a) a transmitter; (b) a receiver; and (c) a radiotelephone alarm signal generating device.

Types of Wave and Frequency Range 3. The equipment shall be capable of adjustment for the transmission of waves of type A3 on any frequency of not less than 1,605 kilocycles per second or more than 2,850 kilocycles per second and on the frequency 6,204 kilocycles per second, and for the reception of waves of type A2 and type A3 on any frequency of not less than 1,605 kilocycles per second or more than 3,000 kilocycles per second and on any frequency of not less than 6,000 kilocycles per second or more than 6,525 kilocycles per second.

Operating Frequencies 4. (1) The transmitter shall be capable of transmitting waves of type A3 and of being set for transmission on- (a) the radiotelephone distress frequency; (b) the frequency of 2,760 kilocycles per second or the frequency of 2,201 kilocycles per second; (c) one other spot frequency not being less than 1,605 kilocycles per second or more than 2,850 kilocycles per second; and (d) the frequency of 6,204 kilocycles per second, but shall not be capable of being operated otherwise than on spot frequencies.

(2) The receiver shall be capable of receiving signals of type A2 and type A3 within the frequency range of 1,605 kilocycles per second to 3,000 kilocycles per second and the frequency range of 6,000 kilocycles per second to 6,525 kilocycles per second.

Size of Controls 5. All controls on the installation shall be of such size as will permit normal adjustments being performed by a person wearing thick gloves.

Facilities for Two-way Communications 6. (1) The equipment shall be capable of changing instantaneously from transmitting to receiving, and from receiving to transmitting, by means of a press or other single switch, aerial change-over relays and such other devices as are necessary for that purpose and if, in addition, a voice-operated device is provided, the operating lag shall not exceed 10 milliseconds, and the release lag shall be not less than 150 milliseconds and not more than 350 milliseconds.

(2) Means shall be provided for protecting the receiver from damage when the equipment is transmitting.

TRANSMITTER Selection of Transmitter Frequencies 7. A selection of any of the frequencies on which the transmitter is capable of transmitting shall be by a single switch or pushbutton, which shall be clearly marked to indicate the frequency selected, but a single additional external control may be provided to adjust the transmitter for optimum performance.

Load Impedance 8. The transmitter shall comply with the requirements specified in this Schedule when connected to an artificial load of 10 ohms resistance in series with a capacitance of a value not greater than 200 picofarads and not less than 60 picofarads at frequencies of not less than 1,605 kilocycles per second or more than 2,850 kilocycles per second and of 250 ohms resistance in series with a 12 microhenrys inductance at the frequency 6,204 kilocycles per second.

Carrier Power 9. The total carrier power delivered by the transmitter to the artificial load referred to in the last preceding item (not including power dissipated in an aerial tuning inductor or any other component forming part of the transmitter) shall, on any frequency that it is required to cover, be not less than 15 watts and not more than 100 watts.

Modulation 10. The speech modulation of the transmitter shall be such that- (a) the frequency response of the microphone and transmitter together shall not vary by more than 7.5 decibels from a value that rises at the rate of 6 decibels per octave from 250 cycles per second to 2,500 cycles per second; and (b) the response relative to the peak response shall be not higher than minus 20 decibels at all frequencies exceeding 6,000 cycles per second.

(2) The modulating system shall be such that the peak modulation of the transmitter is not less than 80 per centum and not more than 95 per centum for any sound pressure the root mean square value of which, measured in the plane of the microphone mouthpiece with a pure sine wave of 1,000 cycles per second, is not less than 25 dynes or more than 100 dynes per square centimetre.

(3) A means shall be provided to prevent over-modulation of the transmitter.

Harmonic Content 11. The harmonic content of the audio-frequency component of the modulated output voltage shall not exceed 10 per centum when- (a) the transmitter is operating at, or below, its rated power and is modulated to a depth of 90 per centum by a sinusoidal wave of a frequency of 1,000 cycles per second applied to the microphone terminals; and (b) the peak limiter is rendered inoperative.

Frequency Stability 12. The transmitter shall be capable of maintaining a frequency tolerance of plus or minus 0.005 per centum throughout every transmission without adjustment of controls, notwithstanding- (a) variations of the impedance of the aerial or other load to which it is connected; or (b) variations of supply voltage not exceeding plus or minus 10 per centum.

Spurious and Harmonic Components in Output Signal 13. (1) The radio frequency output of the transmitter shall be free from frequency components due to spurious oscillations in any part of the equipment.

(2) The output power at any harmonic of the radio frequency shall not exceed 0.001 watt.

(3) With the microphone open or short-circuited- (a) the total noise and hum power in the output wave shall be at least 20 decibels below the carrier power; and (b) the total noise and hum power contained in the sidebands corresponding to audio-frequencies within the limits of 250 cycles per second and 3,000 cycles per second shall be at least 40 decibels below the carrier power.

Operating Facilities 14. The transmitter shall be such that- (a) one operator can carry out, in not more than 10 seconds, all adjustments necessary to change the transmitter from operation on any one of the frequencies referred to in item 4 of this Schedule to operation on any other of those frequencies; (b) if the transmitter is so designed and constructed that it is necessary to delay the application of certain voltages for a period after it has been switched on, the delay is automatically provided for by a delay switch; (c) an indicator shows when the equipment is ready to transmit; and (d) a skilled person can make alterations in the spot frequencies within the limits specified in item 3 of this Schedule without removing the installation from the ship.

Protective Arrangements 15. (1) The transmitter shall be so designed and constructed that, when it is adjusted for maximum power, the aerial may be disconnected or the output short-circuited without damage being caused to any part of the installation.

(2) Means shall be provided for protecting the transmitter from damage caused by excessive current or voltage.

RADIOTELEPHONE ALARM SIGNAL GENERATING DEVICE (AUDIO-FREQUENCY) 16. The radiotelephone alarm signal generating device shall be- (a) an integral part of a radiotelephone installation; or (b) capable of being coupled to the radiotelephone transmitter by either acoustic or electrical means.

17. (1) The device shall be capable of generating the radiotelephone alarm signal- (a) within a period of 30 seconds after it is energized; and (b) for a period of not less than 30 and not more than 60 seconds.

(2) The radiotelephone alarm signal consists of two alternately produced sinusoidal tones of 250 milleseconds duration plus or minus 50 milliseconds, one tone being within plus or minus 1.5 per centum of 1,300 cycles per second and the other tone being within plus or minus 1.5 per centum of 2,200 cycles per second, with the interval between successive tones not greater than 50 milliseconds.

18. The device shall be capable in an installation of modulating the radiotelephone transmitter by each tone to a depth in the range 80 per centum to 95 per centum or within the range 0.83 to 1 of the maximum depth of modulation possible on the transmitter if that maximum depth of modulation is less than 95 per centum.

19. Means shall be provided so that- (a) an audible reproduction of the generated signal is present whenever the radiotelephone alarm signal is generated by the device; (b) the alarm facility may be tested without the generation of radio-frequency energy; and (c) the radiotelephone alarm signal may be repeated after an interval of not more than two minutes after the conclusion of a signal.

20. Not more than two operating controls shall be available at the exterior of the device, each control being clearly labelled to show its purpose.

21. Controls, when provided for the adjustment of frequency, duration or level of the signal elements, shall not be accessible at the exterior of the device.

22. The device shall be capable of being taken out of service at any time.

23. The device shall comply with the provisions of this Schedule notwithstanding a variation in the supply voltage of plus and minus 10 per centum relative to the nominal supply voltage.

RECEIVER General 24. (1) The receiver shall consist of a single unit that is capable of reception of the frequency ranges specified in the next succeeding item.

(2) The receiver shall be capable of being connected without delay to the aerial (not being the spare aerial) referred to in regulation 36 of these Regulations.

(3) The receiver shall bear a plate stating the frequency range it is intended to cover.

(4) The receiver shall not be constructed for operation in whole or in part from energy supplied by dry batteries.

Frequency Ranges and Types of Waves 25. (1) The receiver shall be capable of receiving waves of type A2 and type A3 within the frequency range of 1,605 kilocycles per second to 3,000 kilocycles per second and the frequency range of 6,000 kilocyles per second to 6,525 kilocycles per second, either by continuously tuned circuits or in steps not greater than 1 kilocycle per second.

(2) The receiver shall include spot tuned circuits for reception on the frequencies of 2,182 kilocycles per second and 6,204 kilocycles per second and may include additional spot tuned circuits.

Reception Facilities 26. The receiver shall be capable of both telephone and loudspeaker reception throughout the frequency range specified in the last preceding item.

Controls 27. The receiver shall be provided with- (a) a manual audio-frequency gain control; (b) a tuning control the backlash of which does not exceed 1 degree; (c) a scale calibrated directly in frequency and graduated in steps not greater than 200 kilocycles per second for use with the tuning control referred to in the last preceding paragraph; and (d) a switch to bring the high stability spot tuned facilities into use, being a switch clearly marked to indicate the frequency of operation.

General Method of Testing 28. For the purposes of the tests referred to in items 29 to 38 (inclusive) of this Schedule, the following conditions shall, unless the contrary intention appears in any particular item, apply: (a) an artificial aerial shall be used for the test and shall consist of- (i) a 10 ohm resistor in series with a capacitor having a value of not less than 60 picofarads and not more than 200 picofarads at frequencies of not less than 1,605 kilocycles per second and not more than 3,000 kilocycles per second; and (ii) a 250 ohm resistor in series with a 12 microhenry inductance at frequencies of not less than 6,000 kilocycles per second and not more than 6,525 kilocycles per second; (b) signals of type A2 used in the test shall be modulated to a depth of 30 per centum and shall have a note frequency of 1,000 cycles per second; and (c) the frequency of the unwanted signals applied shall not be restricted to the frequency range of the receiver.

Selectivity 29. (1) The selectivity of the receiver at a point immediately preceding the final detector shall be such that- (a) discrimination of not more than 6 decibels is obtained at frequencies removed from tune by not more than 3 kilocycles per second; (b) discrimination of not less than 40 decibels is obtained at frequencies removed from tune by 11 kilocycles per second; and (c) discrimination of not less than 60 decibels is obtained at frequencies removed from tune by 15 kilocycles per second.

(2) If the receiver is a superheterodyne receiver- (a) the image discrimination shall be not less than 40 decibels at frequencies not higher than 3,000 kilocycles per second and not less than 30 decibels at frequencies not lower than 6,000 kilocycles per second; and (b) the intermediate frequency response ratio shall be not less than 60 decibels over the entire tuning range.

Sensitivity 30. The standard output of the receiver shall be obtained with an input signal of type A2 not exceeding 30 decibels above 1 microvolt.

Signal to Noise Ratio 31. (1) The signal to noise ratio of the output of the receiver shall be at least 20 decibels when the receiver is adjusted to give the standard output with an input signal of type A2 modulated 30 per centum at an input level of 30 decibels above 1 microvolt.

(2) For the purposes of this item, spurious whistles shall be deemed to be noise.

Automatic Gain Control 32. (1) The receiver shall be provided with an automatic gain control capable of operating efficiently on waves of type A3.

(2) The automatic gain control shall be such that, when the receiver is adjusted to give the standard output with an input signal of type A2 modulated 30 per centum at an input level of 30 decibels above 1 microvolt, an increase in input of 60 decibels does not increase the output by more than 10 decibels.

Blocking 33. The change in the output of the receiver shall not exceed 3 decibels when- (a) the receiver is adjusted to give the standard output with an input wanted signal of type A2 at a level of 60 decibels above 1 microvolt; and (b) an input signal of type A1 is then applied at a level of 100 decibels above 1 microvolt and at a frequency 20 kilocycles per second above or below the wanted frequency.

Cross Modulation 34. The receiver shall not produce an output of level higher than 30 decibels below the standard output when- (a) the receiver with the automatic gain control in operation is adjusted to give the standard output with an input wanted signal of type A2 at a level of 60 decibels above 1 microvolt and of a frequency of not less than 1,605 kilocycles per second or more than 3,000 kilocycles per second or of a frequency of not less than 6,000 kilocycles per second and not more than 6,525 kilocycles per second; (b) the modulation of the signal generator has been switched off; and (c) an input signal of type A2 is then applied at a level of 90 decibels above 1 microvolt and at a frequency of 20 kilocycles per second above or below the wanted frequency.

Intermodulation and Harmonic Production 35. The receiver shall not produce an output exceeding the standard output when- (a) the receiver with the automatic gain control out of operation is adjusted to give the standard output with an input signal of type A2 modulated 30 per centum at a level of 30 decibels above 1 microvolt; (b) the wanted signal has been removed; and (c) any two unwanted signals, one of type A1 and the other of type A2 each of which is of a level 100 decibels above 1 microvolt and neither of which has a carrier frequency that is- (i) within 50 kilocycles per second of the wanted signal; or (ii) of such frequency as to produce an output greater than 20 decibels below the standard output when modulated and applied alone, are then simultaneously applied.

Fidelity 36. (1) The maximum change in level of the output of the receiver shall be less than 8 decibels when the modulation frequency of an input signal of constant level and modulation depth is varied continuously from 250 cycles per second to 3,000 cycles per second.

(2) The receiver shall comply with the requirement of the last preceding sub-item when the level and depth of the modulation of the input signal are such that the output of the receiver does not exceed the standard output.

Non-linear Distortion 37. With the automatic gain control switched on, the total harmonic content of the audio-frequency output of the receiver at any output not exceeding the standard output shall not exceed 10 per centum with an input signal at any level between 40 decibels and 80 decibels above 1 microvolt and sinusoidally modulated to a depth of 30 per centum at 1,000 cycles per second.

Tuning Drift and Stability 38. The tuning drift and stability of the receiver shall comply with the following requirements: (a) after the receiver has been switched on for 5 minutes, the changes of tune frequency over the whole tuning range during any period of 5 minutes shall not exceed 10 parts in 10,000; (b) a change of 10 per centum in any one of the supply voltages to the receiver shall not produce a maximum change of tune frequency exceeding 10 parts in 10,000; (c) a change in ambient temperature of 5 degrees Centigrade within the range of 0 degrees Centigrade to 50 degrees Centigrade applied after the receiver has been switched on for 1 hour shall not produce a maximum change of tune frequency exceeding 10 parts in 10,000; and (d) when the spot tuned facility is in use and the receiver has been switched on for one hour, the frequency of tune shall not differ from the nominal frequency by more than 2 parts in 10,000 notwithstanding- (i) a change of 10 per centum in any one of the supply voltages; and (ii) a change in ambient temperature within the range of 0 degrees Centigrade to 50 degrees Centigrade.

Radiation 39. (1) The receiver shall not, when in use, produce a field exceeding 0.1 microvolt per metre when measured at a distance of 1 mile from the receiver.

(2) The receiver shall be deemed to comply with the requirements of the last preceding sub-item if, in the circumstances set out in the following paragraphs, the power measured by the measuring instrument does not exceed 4 x 10*-10* watts, whatever the resistance of the measuring instrument or the adjustment of the receiver and notwithstanding that the search coil is short-circuited or moved in any way other than a way that causes it to approach within 6 inches of the receiver case: (a) the receiver is placed centrally in a screened earthed enclosure at least 6 feet cube; (b) the earth terminal of the receiver is connected to the inside of the screen; (c) the aerial terminal of the receiver is connected through an unscreened four turn rectangular search coil 1 foot square situated within the enclosure and an unscreened lead to a resistive measuring instrument mounted outside the enclosure and having its other terminal earthed; (d) the receiver is energized; and (e) if the receiver is capable of headphone reception, unscreened headphones are connected to it.

ADDITIONAL SAFEGUARDS TO BE INCORPORATED WHEN THE EQUIPMENT INCLUDES SEMI-CONDUCTOR DEVICES 40. Where semi-conductor devices are incorporated in the equipment, the following requirements shall be met: (a) the maker's maximum ratings for each type of semi-conductor device shall not, in any respect, be disregarded, and, in particular, the recommended junction temperature shall not be exceeded; (b) adequate screening and filtering shall be provided to protect the devices from damage due to radio-frequency energy; and (c) the devices shall be effectively protected from damage due to- (i) transient changes in power supply voltages; (ii) accidental reversal of power supply polarity; and (iii) a sustained increase in power supply voltage of 25 per centum relative to the nominal battery voltage when the equipment is operated from a battery of secondary cells.

PART 2 RESERVE RADIOTELEPHONY INSTALLATION GENERAL Definitions 41. In this Part, "the equipment" and "the standard output" have the same respective meanings as they have in Part 1 of this Schedule.

Components 42. A reserve radiotelephony installation shall include- (a) a transmitter; and (b) a receiver.

Types of Wave and Frequency Range 43. The equipment shall be capable of adjustment for the transmission of waves of type A3, and for the reception of waves of type A2 and type A3, on each of the following frequencies: (a) 2,182 kilocycles per second; and (b) 6,204 kilocycles per second.

Operating Frequencies 44. (1) The transmitter shall be capable of transmitting waves of type A3, and of being set for transmission, on each of the frequencies referred to in the last preceding item, but shall not be capable of being operated otherwise than on spot frequencies.

(2) The receiver shall be capable of receiving signals of type A2 and type A3 on each of the frequencies referred to in item 43 of this Schedule.

Size of Controls 45. All controls on the installation shall be of such size as will permit normal adjustments being performed by a person wearing thick gloves.

Facilities for Two-way Communications 46. (1) The equipment shall be capable of changing instantaneously from transmitting to receiving, and from receiving to transmitting, by means of a press or other single switch, aerial change-over relays and such other devices as are necessary for that purpose and if, in addition, a voice-operated device is provided, the operating lag shall not exceed 10 milliseconds, and the release lag shall not be less than 150 milliseconds and not more than 350 milliseconds.

(2) Means shall be provided for protecting the receiver from damage when the equipment is transmitting.

TRANSMITTER Selection of Transmitter Frequencies 47. Selection of any of the frequencies on which the transmitter is capable of transmitting shall be by a single switch or pushbutton, which shall be clearly marked to indicate the frequency selected, but a single additional external control may be provided to adjust the transmitter for optimum performance.

Load Impedance 48. The transmitter shall comply with the requirements specified in this Schedule when connected to an artificial load of 10 ohms resistance in series with a capacitance having any value between 200 picofarads and 60 picofarads at the frequency of 2,182 kilocycles per second and of 250 ohms resistance in series with a 12 microhenrys inductance at the frequency of 6,204 kilocycles per second.

Carrier Power 49. The total carrier power delivered by the transmitter to the artificial load referred to in the last preceding item (not including power dissipated in an aerial tuning inductor or any other component forming part of the transmitter) shall, on each of the frequencies referred to in item 43 of this Schedule, be not less than 15 watts and not more than 100 watts.

Modulation 50. (1) The speech modulation of the transmitter shall be such that- (a) the frequency response of the microphone and transmitter together shall not vary by more than 7.5 decibels from a value which rises at the rate of 6 decibels per octave from 250 cycles per second to 2,500 cycles per second; and (b) the response relative to the peak response shall be not higher than minus 20 decibels at every frequency exceeding 6,000 cycles per second.

(2) The modulating system shall be such that the peak modulation of the transmitter is not less than 80 per centum and not more than 95 per centum for any sound pressure the root mean square value of which, measured in the plane of the microphone mouthpiece with a pure sine wave of 1,000 cycles per second, is not less than 25 dynes or more than 100 dynes per square centimetre.

(3) A means shall be provided to prevent over-modulation of the transmitter.

Harmonic Content 51. The harmonic content of the audio-frequency component of the modulated output voltage shall not exceed 10 per centum when- (a) the transmitter is operating at, or below, its rated power and is modulated to a depth of 90 per centum by a sinusoidal wave of a frequency of 1,000 cycles per second applied to the microphone terminals; and (b) the peak limiter is rendered inoperative.

Frequency Stability 52. The transmitter shall be capable of maintaining a frequency tolerance of plus or minus 0.005 per centum throughout every transmission without adjustment of controls, notwithstanding- (a) variations of the impedance of the aerial or other load to which it is connected; or (b) variations of supply voltage not exceeding plus or minus 10 per centum.

Spurious and Harmonic Components in Output Signal 53. (1) The radio frequency output of the transmitter shall be free from frequency components due to spurious oscillations in any part of the equipment.

(2) The output power at any harmonic of the radio frequency shall not exceed 0.001 watt.

(3) With the microphone open or short-circuited- (a) the total noise and hum power in the output wave shall be at least 20 decibels below the carrier power; and (b) the total noise and hum power contained in the sidebands corresponding to audio-frequencies within the limits of 250 cycles per second and 3,000 cycles per second shall be at least 40 decibels below the carrier power.

Operating Facilities 54. The transmitter shall be such that- (a) one operator can carry out, in not more than 10 seconds, all adjustments necessary to change the transmitter from operation on any one of the frequencies on which it is capable of transmitting to operation on any other of those frequencies; (b) if the transmitter is so designed and constructed that it is necessary to delay the application of certain voltages for a period after it has been switched on, the delay is automatically provided for; and (c) an indicator shows when the equipment is ready to transmit.

55. (1) The transmitter shall be so designed and constructed that, when it is adjusted for maximum power, the aerial may be disconnected or the output short-circuited without damage being caused to any part of the installation.

(2) Means shall be provided for protecting the transmitter from damage caused by excessive current or voltage.

RECEIVER General 56. (1) The receiver shall consist of a single unit that is capable of reception of each of the frequencies referred to in item 43 of this Schedule.

(2) The receiver shall be capable of being connected without delay to the aerial (not being the spare aerial) referred to in regulation 36 of these Regulations.

(3) The receiver shall bear a plate stating the frequency range or frequencies it is intended to cover.

(4) The receiver shall not be constructed for operation in whole or in part from energy supplied by dry batteries.

Frequency Ranges and Types of Waves 57. The receiver shall be capable of receiving waves of type A2 and type A3 and shall include spot-tuned circuits for reception on each of the frequencies referred to in item 43 of this Schedule.

Reception Facilities 58. The receiver shall be capable of loud speaker reception on each of the frequencies referred to in item 43 of this Schedule.

Controls 59. The receiver shall be provided with- (a) a manual audio-frequency gain control; and (b) a switch that causes the receiver to be tuned by means of high stability spot-tuned circuits to each of the spot frequencies on which the receiver is capable of receiving, being a switch clearly marked to indicate the frequency to which the receiver is tuned.

Conditions of Testing 60. For the purposes of the tests referred to in items 61 to 70 (inclusive), the following conditions shall, unless the contrary intention appears in any particular item, apply: (a) an artificial aerial shall be used for a test and shall consist of- (i) a 10 ohm resistor in series with a capacitor having a value of not less than 60 picofarads and not more than 200 picofarads at the frequency of 2,182 kilocycles per second; and (ii) a 250 ohm resistor in series with a 12 microhenry inductance at the frequency of 6,204 kilocycles per second; (b) signals of type A2 used in a test shall be modulated to a depth of 30 per centum and shall have a note frequency of 1,000 cycles per second; and (c) the frequency of the unwanted signals applied during the test shall not be restricted to the frequency range of the receiver.

Selectivity 61. (1) The selectivity of the receiver at a point immediately preceding the final detector shall be such that- (a) discrimination of not more than 6 decibels is obtained at frequencies removed from tune by 4 kilocycles per second; (b) discrimination of not less than 40 decibels is obtained at frequencies removed from tune by 11 kilocycles per second; and (c) discrimination of not less than 60 decibels is obtained at frequencies removed from tune by 15 kilocycles per second.

(2) If the receiver is a superheterodyne receiver- (a) the image discrimination shall be not less than 40 decibels at the frequency of 2,182 kilocycles per second and not less than 30 decibels at the frequency 6,204 kilocycles per second; and (b) the intermediate frequency response ratio shall be not less than 60 decibels.

Sensitivity 62. The standard output of the receiver shall be obtained with an input signal of type A2 not exceeding 30 decibels above 1 microvolt.

Signal to Noise Ratio 63. (1) The signal to noise ratio of the output of the receiver shall be at least 20 decibels when the receiver is adjusted to give the standard output with an input signal of type A2 modulated 30 per centum at an input level of 30 decibels above 1 microvolt.

(2) For the purposes of this item, spurious whistles shall be deemed to be noise.

Automatic Gain Control 64. (1) The receiver shall be provided with an automatic gain control capable of operating efficiently on waves of type A3.

(2) The automatic gain control shall be such that, when the receiver is adjusted to give the standard output with an input signal of type A2 modulated 30 per centum at an input level of 30 decibels above 1 microvolt, an increase in input of 60 decibels does not increase the output by more than 10 decibels.

Blocking 65. The change in the output of the receiver shall not exceed 3 decibels when- (a) the receiver is adjusted to give the standard output with an input wanted signal of type A2 at a level of 60 decibels above 1 microvolt; and (b) an input signal of type A1 is then applied at a level of 100 decibels above 1 microvolt and at a frequency 20 kilocycles per second above or below the wanted frequency.

Cross Modulation 66. The receiver shall not produce an output of level higher than 30 decibels below the standard output when- (a) the receiver with the automatic gain control in operation is adjusted to give the standard output with an input wanted signal of type A2 at a level of 60 decibels above 1 microvolt and of a frequency equal to either of the frequencies referred to in item 43 of this Schedule; (b) the modulation of the signal generator has been swiched off; and (c) an input signal of type A2 is then applied at a level of 90 decibels above 1 microvolt and at a frequency of 20 kilocycles per second above or below the wanted frequency.

Intermodulation and Harmonic Production 67. The receiver shall not produce an output exceeding the standard output when- (a) the receiver with the automatic gain control out of operation is adjusted to give the standard output with an input signal of type A2 modulated 30 per centum at a level of 30 decibels above 1 microvolt; (b) the wanted signal has been removed; and (c) any two unwanted signals, one of type A1 and the other of type A2, each of which is of a level 100 decibels above 1 microvolt and neither of which has a carrier frequency which is- (i) within 50 kilocycles per second of the wanted frequency; or (ii) of such frequency as to produce an output greater than 20 decibels below the standard output when modulated and applied alone, are then simultaneously applied.

Fidelity 68. (1) The maximum change in level of the output of the receiver shall be less than 8 decibels when the modulation frequency of an input signal of constant level and modulation depth is varied continuously from 250 cycles per second to 3,000 cycles per second.

(2) The receiver shall comply with the requirement of the last preceding sub-item when the level and depth of the modulation of the input signal are such that the output of the receiver does not exceed the standard output.

Non-Linear Distortion 69. With the automatic gain control switched on, the total harmonic content of the audio-frequency output of the receiver at any output not exceeding the standard output shall not exceed 10 per centum with an input signal at any level between 40 decibels and 80 decibels above 1 microvolt and sinusoidally modulated to a depth of 30 per centum at 1,000 cycles per second.

Tuning Drift and Stability 70. The tuning drift and stability of the receiver shall be such that when the spot tuned facility is in use and the receiver has been switched on for one hour the frequency of tune shall not differ from the nominal frequency by more than 2 parts in 10,000 notwithstanding- (i) a change of 10 per centum in any one of the supply voltages; or (ii) a change in ambient temperature within the range of 0 degrees Centigrade to 50 degrees Centigrade.

Radiation 71. (1) The receiver shall not, when in use, produce a field exceeding 0.1 microvolt per metre when measured at a distance of 1 mile from the receiver.

(2) The receiver shall be deemed to comply with the requirements of the last preceding sub-item if, in the circumstances set out in the following paragraphs, the power measured by the measuring instrument does not exceed 4 x 10*-10* watts, whatever the resistance of the measuring instrument or the adjustment of the receiver and notwithstanding that the search coil is short-circuited or moved in any way other than a way that causes it to approach within 6 inches of the receiver case: (a) the receiver is placed centrally in a screened earthed enclosure at least 6 feet cube; (b) the earth terminal of the receiver is connected to the inside of the screen; (c) the aerial terminal of the receiver is connected through an unscreened four-turn rectangular search coil 1 foot square situated within the enclosure and an unscreened lead to a resistive measuring instrument mounted outside the enclosure and having its other terminal earthed; (d) the receiver is energized; and (e) if the receiver is capable of headphone reception, unscreened headphones are connected to it.

Additional Safeguards to be Incorporated when the Equipment Includes Semi-conductor Devices 72. Where semi-conductor devices are incorporated in the equipment, the following requirements shall be met: (a) the maker's maximum ratings for each type of semi-conductor device shall not, in any respect, be disregarded, and, in particular, the recommended junction temperature shall not be exceeded; (b) adequate screening and filtering shall be provided to protect the devices from damage due to radio-frequency energy; and (c) the devices shall be effectively protected from damage due to- (i) transient changes in power supply voltages; (ii) accidental reversal of power supply polarity; or (iii) a sustained increase in power supply voltage of 25 per centum relative to the nominal battery voltage when the equipment is operated from a battery of secondary cells.

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NAVIGATION (RADIO) REGULATIONS - SCHEDULE 3

SCH

SCHEDULE 3 Regulation 9 CLIMATIC AND DURABILITY TESTS GENERAL 1. In this Schedule- (a) a reference to Class B equipment shall be read as a reference to equipment appropriated for use only below deck or in a deckhouse or other like compartment; and (b) a reference to Class X equipment shall be read as a reference to equipment appropriated for use or storage in the open or in an open boat.

2. (1) Class B equipment shall be subjected to the tests specified in the first column of the table in this sub-item and Class X equipment shall be subjected to the tests specified in the second column of that table, in the order indicated by the numbers preceding the references to those tests in those columns.

------------------------------------------------------------------------------ -- Column 1 Column 2 Tests to which Class B Equipment to be subjected Tests to which Class X Equipment to be subjected ------------------------------------------------------------------------------ -- 1. Vibration test 1. Vibration test 2. Bump test 2. Bump test 3. Dry heat test 3. Dry heat test 4. Damp heat test 4. Damp heat test 5. Low temperature test 5. Low temperature test 6. Corrosion test (salt water) 6. Rain test 7. Corrosion test (acid fumes) if a battery is 7. Immersion test included in the equipment 8. Corrosion test (salt water) 9. Corrosion test (acid fumes) if a battery is included in the equipment 10. Mould growth test ------------------------------------------------------------------------------ -- (2) Where the provisions of this Schedule require the equipment to be kept working for the purposes of any test, power shall be supplied to the equipment at the voltage at which the equipment is intended to be operated.

(3) The tests referred to in this item shall be conducted in accordance with the succeeding provisions of this Schedule.

VIBRATION TEST 3. (1) The equipment, complete with chassis covers and shock absorbers (if any) and in its normal operating position, shall be clamped to a vibration table.

(2) The table shall be vibrated at all frequencies between 0 and 12.5 cycles per second at an amplitude of plus and minus 0.16 centimetre while the equipment is kept working continuously.

(3) The table shall be so vibrated for 3 periods each of 8 minutes' duration.

(4) The direction of the vibration during each period referred to in the last preceding sub-item shall be perpendicular to the direction of the vibration during the other two periods.

BUMP TEST 4. The equipment shall be subjected to not less than 500 bumps at a constant rate not being less than 1 bump or more than 4 bumps per second with a free drop of at least 2.5 centimetres.

DRY HEAT TEST 5. (1) Class B equipment shall be placed in a chamber which is maintained at a constant temperature of 55 degrees Centigrade, within a tolerance of plus or minus 1 degree Centigrade, and be kept working continuously at that temperature for a period of 2 hours.

(2) Class X equipment shall be placed in a chamber that is maintained for a period of 10 hours at a constant temperature of 70 degrees Centigrade, within a tolerance of plus or minus 1 degree Centigrade, and is then cooled to a constant temperature of 55 degrees Centigrade, within a tolerance of plus or minus 1 degree Centigrade, the equipment being kept working continuously at that last-mentioned temperature for a period of 2 hours.

DAMP HEAT TEST 6. (1) The equipment shall be placed in a chamber which shall, within a period not exceeding 2 hours, be heated from room temperature to 40 degrees Centigrade and brought to a relative humidity of not less than 95 per centum.

(2) The chamber shall be kept at a temperature of 40 degrees Centigrade, within a tolerance of plus or minus 1 degree Centigrade, for a period of 12 hours, and at a relative humidity of not less than 95 per centum.

(3) At the beginning of the last hour of the period of 12 hours, all accessible surfaces and components shall be wiped dry and any fans or drying lamps provided in the equipment shall be switched on.

(4) After the fans or drying lamps have been in operation for 30 minutes and while the temperature of the chamber is still 40 degrees Centigrade, within a tolerance of plus or minus 1 degree Centigrade, the equipment shall be operated and checked.

(5) The temperature of the chamber shall then, in preparation for the low temperature test, be allowed to fall below 25 degrees Centigrade, the equipment being retained in the chamber.

LOW TEMPERATURE TEST 7. (1) Class B equipment shall be exposed to a temperature of minus 15 degrees Centigrade, within a tolerance of plus or minus 1 degree Centigrade, at normal atmospheric pressure for a period of not less than 12 hours.

(2) Class X equipment shall be exposed to a temperature of minus 25 degrees Centigrade, within a tolerance of plus or minus 1 degree Centigrade, at normal atmospheric pressure for a period of not less than 12 hours.

RAIN TEST 8. (1) The equipment shall be placed in a chamber fitted with 8 shower heads, the discharge end of each of which consists of a flat, non-rustable metal plate, 0.16 centimetre thick, having 36 holes each of 0.1 centimetre diameter evenly spaced in concentric circles in the following manner: 16 holes on the periphery of a circle of 5.1 centimetres diameter; 8 holes on the periphery of a circle of 3.8 centimetres diameter; 8 holes on the periphery of a circle of 2.5 centimetres diameter; and 4 holes on the periphery of a circle of 1.3 centimetres diameter.

(2) The shower heads shall be arranged at a distance of not less than 50 centimetres and not more than 80 centimetres from the equipment in such a manner that spray from 4 of the shower heads is directed downwards at an angle of 45 degrees at each of the four uppermost corners of the equipment, and the spray from the other 4 shower heads is directed horizontally at the centre of each area of the four sides of the equipment.

(3) Fresh water at room temperature and at a static pressure not being less than 15 pounds per square inch or more than 25 pounds per square inch shall be sprayed on the equipment from the shower heads for a period of 1 hour, the equipment being in the position in which it is normally operated.

(4) The equipment shall, throughout the test, be rotated at not less than 12 and not more than 20 revolutions per minute about a vertical axis passing through the centre of the equipment.

IMMERSION TEST 9. (1) The equipment in the condition in which it will normally be kept on board ship shall be immersed in water the surface of which is at least 10 centimetres above the highest point of the equipment, and shall remain so immersed for a period of 1 hour.

(2) Upon its removal from the water the equipment shall be drained of water.

CORROSION TEST (SALT WATER) 10. (1) The equipment shall be placed in a chamber fitted with apparatus capable of spraying in the form of a fine mist either natural sea water or water which contains, within a tolerance of plus or minus 10 per centum, the following percentages of salts in solution: Salt Percentage Sodium Chloride . . . . . . . . 2.7 Magnesium Chloride . . . . . . . 0.6 Calcium Chloride . . . . . . . . 0.1 Potassium Chloride . . . . . . . 0.07 (2) The spraying apparatus shall be such that the products of corrosion cannot mix with the sea water or solution contained in the spray reservoir.

(3) The equipment shall be sprayed simultaneously on all its external surfaces with the sea water or solution for a period of 1 hour and shall be kept working continuously for the second 30 minutes of that hour.

(4) The equipment shall immediately after the expiration of the hour be stored for a period of 7 days at a temperature of 40 degrees Centigrade, within a tolerance of plus or minus 1 degree Centigrade, and at a relative humidity of not less than 60 per centum and not more than 80 per centum.

(5) The equipment shall be so sprayed and stored on four separate occasions.

CORROSION TEST (ACID FUMES) 11. (1) A battery included in the equipment shall be fully charged and then fitted into the equipment.

(2) If the battery can be charged without being removed from the equipment, the battery shall continue to be charged at the maximum rate appropriate to it for a period of 24 hours.

(3) The equipment shall, immediately after the expiration of that period, be stored for a period of 4 weeks at a temperature of 40 degrees Centigrade, within a tolerance of plus or minus 1 degree Centigrade, and at a relative humidity of not less than 60 per centum and not more than 80 per centum.

MOULD GROWTH TEST 12. (1) The equipment shall be inoculated by spraying with an aqueous suspension of mould spores containing the cultures specified in the first column, or the cultures specified in the second column, of the following table: ------------------------------------------------------------------------------ -- First Column Second Column ------------------------------------------------------------------------------ -- Aspergillus niger Aspergillus niger Aspergillus amstelodami Aspergillus amstelodami Paecilomyces varioti Aspergillus versicolor Stachybotrys atra Stachybotrys atra Penicillium brevi-compactum Penicillium brevi-compactum Pencillium cyclopium Cladosporum herbasum Chaetomium globosum ------------------------------------------------------------------------------ -- (2) Immediately after it has been so sprayed, the equipment shall be placed in a chamber the temperature of which shall be maintained at a fixed value not less than 31 degrees Centigrade or more than 33 degrees Centigrade and controlled to within a tolerance of plus or minus 1 degree Centigrade at a relative humidity of not less than 95 per centum, and shall be kept in the chamber for a period of 28 days.

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NAVIGATION (RADIO) REGULATIONS - SCHEDULE 4

Amended by 1973 No. 121 r. 6

SCH

SCHEDULE 4 Regulations 12, 33 and 34 RADIOTELEGRAPHY EQUIPMENT IN OR FOR LIFEBOATS AND LIFERAFTS PART 1 FIXED EQUIPMENT Components 1. The radiotelegraphy installation referred to in regulation 33 of these Regulations (in the succeeding provisions of this Part referred to as "the fixed equipment ") shall consist of- (a) a radiotelegraphy transmitter and receiver; (b) an aerial and earth system; (c) a source of energy; and (d) such other equipment as is necessary for the operation of the installation.

General Requirements 2. (1) The fixed equipment shall be so designed that an unskilled person can readily cause it to transmit the signals referred to in item 20 of this Schedule.

(2) The purpose of all controls not required for transmitting those signals shall be clearly and permanently indicated.

3. Simple instructions for the operation of the fixed equipment on the frequencies specified in items 14 and 21 of this Schedule shall be affixed in clear and permanent form to or near the equipment.

4. All controls shall be of such size as will permit normal adjustments to be made by a person wearing thick gloves and, in particular, all tuning knobs shall be at least 2 inches in diameter.

5. The change-over from transmitting to receiving and from receiving to transmitting, including automatic change of aerial connexions, shall be made by means of one switch.

6. The fixed equipment shall be readily removable from the lifeboat.

7. An electric lamp of a power not less than 3 watts or more than 15 watts, with a waterproof casing, shall be provided to illuminate the control panels and the instructions.

8. (1) An electrical heater connected to the ship's main source of electrical energy and capable of maintaining the interior of the case in which the fixed equipment is installed at a temperature at least 10 degrees Centigrade above the ambient temperature shall be provided.

(2) The heater shall be so mounted that it reduces the risk of the controls or cover of the fixed equipment becoming frozen into position but does not cause any part of the installation to become overheated.

9. All parts of the fixed equipment, other than the aerial and its terminal, that are not at earth potential shall be enclosed.

10. The aerial terminal shall be guarded against accidental contact.

11. The fixed equipment shall be capable of complying with the performance requirements specified in this Schedule whether or not the lifeboat's engine is running, and whether or not the battery is being charged.

Aerial and Earth System 12. (1) The fixed equipment shall include- (a) a single-wire aerial of high conductivity stranded or braided wire capable of being supported by the lifeboat mast without the use of top-masts at a height of not less than 22 feet above the waterline; and (b) an earth system which shall be of the same material throughout and shall consist of at least three independent bolted connexions- (i) to the hull, in the case of a metal lifeboat; or (ii) to a bare copper plate at least six square feet in area fixed to the hull below the waterline, in the case of a wooden lifeboat.

(2) The aerial system shall be mechanically sound.

(3) All practicable steps shall be taken to reduce aerial losses to a minimum.

(4) All parts of the aerial that may come into contact with occupants of the lifeboat when the fixed equipment is in use shall be insulated.

Source of Energy 13. (1) The fixed equipment shall include one 24-volt battery composed of secondary cells and of a capacity sufficient to operate the receiver for 4 hours and immediately after the expiration of that period to run the transmitter under full-power marking conditions for 2 hours.

(2) If it is intended to operate a searchlight from the battery, the capacity of the battery shall be at least 30 ampere hours in excess of that referred to in the last preceding sub-item.

(3) The battery shall be capable of being completely recharged- (a) in not more than 20 hours from a dynamo working in conjunction with, and throughout the normal range of speeds of, the lifeboat engine if the battery is not in use at the same time; and (b) from the ship's main source of electrical energy without being removed from the lifeboat.

(4) The battery shall be such that it does not spill when tilted to an angle of 60 degrees from its normal position in any direction.

(5) The battery shall be electrically isolated from the rest of the equipment when the transmitter and receiver are switched off.

(6) If a vibrator power unit is employed, a reserve vibrator shall be provided and so controlled by a change-over switch that it can be put into circuit immediately.

Transmitter 14. The fixed equipment shall include a transmitter capable of- (a) sending continuously, but not simultaneously, waves of type A2 on the frequencies of 500 kilocycles per second and 8,364 kilocycles per second- (i) by manual operation at all speeds up to at least 25 bauds without critical relay adjustment; and (ii) by means of an automatic keying device complying with the requirements of item 20 of this Schedule; and (b) maintaining, without adjustment of any control, a frequency tolerance throughout every transmission of- (i) plus or minus 0.5 per centum on the frequency of 500 kilocycles per second; and (ii) plus or minus 0.02 per centum on the frequency of 8,364 kilocycles per second, notwithstanding variations of the impedance of the aerial or of any other load to which it is connected or of supply voltage, within plus or minus 10 per centum; and (c) operation on full power within 30 seconds of being switched on.

15. The carrier wave shall be modulated to a depth of 100 per centum by a wave of rectangular character so that the carrier is switched on for not less than 30 per centum and not more than 50 per centum of a modulation cycle.

16. The note frequency shall be not less than 500 cycles per second and not more than 1,200 cycles per second.

17. The power of the transmitter- (a) shall be not less than 15 metre-amperes on the frequency of 500 kilocycles per second when determined in the manner prescribed by sub-regulation (3) of regulation 19 of these Regulations; (b) shall be not less than 50 watts on the frequency of 500 kilocycles per second when measured into an artificial aerial consisting of a 30 ohm resistor in series with a capacitor of every value between 350 picofarads and 450 picofarads; and (c) shall be not less than 15 watts on the frequency of 8,364 kilocycles per second when measured into an artificial aerial simulating the impedance of the aerial specified in item 12 of this Schedule.

18. The transmitter shall be so designed and constructed that, when it is adjusted for maximum power and the transmitting key is depressed, the aerial may be disconnected, or the output short-circuited, without damage being caused to any part of the installation.

19. (1) An artificial aerial shall be provided for testing the transmitter on full power and shall include an indicator or lamp to indicate the passage of radio-frequency currents.

(2) An aerial ammeter and a visual indicator to indicate the passage of radio-frequency current shall be provided.

(3) The ammeter and indicator referred to in the last preceding sub-item shall be so arranged that the failure of either or both does not disconnect the aerial circuit.

Automatic Transmission 20. (1) A device for automatic keying that, when switched into circuit with the transmitter, is capable of automatically- (a) sending the alarm signal specified in sub-item (2) of this item and immediately afterwards stopping and opening the keying circuit unless reset or rewound; and (b) sending the distress call specified in sub-item (3) of this item in such manner that, if the device is used without attention, the transmission will be repeated once every 12 minutes until the source of electrical energy is exhausted, and switching off the electrical energy to the transmitter in the silent interval between those transmissions and, so far as is necessary for the protection of the transmitter, automatically delaying the application of electrical energy after the device has been switched on, shall be provided as part of the fixed equipment.

(2) The alarm signal is 12 dashes each of 4 seconds' duration separated by spaces of 1 second, the length of the dashes and spaces being maintained within a tolerance of plus or minus 0.2 second.

(3) The distress call consists of the distress signal (that is to say, the Morse characters for the letters "S O S" transmitted as a single signal) repeated three times and followed by a long dash, the characters of the distress signal being transmitted at a speed of not less than 8 and not more than 16 words per minute, the duration of the long dash being not less than 20 seconds and the duration of the call being not more than 90 seconds.

(4) Means shall be provided to ensure that, when the distress signal is sent, the transmission begins at the commencement of the signal within 40 seconds after the device for automatic keying has been switched into circuit.

(5) The mechanism for keying the distress call specified in sub-item (3) of this item shall be such that it can be readily adapted to send a distress call consisting of the following signals in the following order over a period not exceeding 90 seconds: (a) the distress signal (that is to say, the Morse characters for the letters "S O S" transmitted as a single signal) repeated three times; (b) the Morse characters for the word "DE "; (c) the Morse characters for the lifeboat's call sign repeated three times; and (d) a long dash having a duration of not less than 20 seconds or two dashes each of 10 to 15 seconds duration.

Receiver 21. The fixed equipment shall include a receiver capable of- (a) receiving waves of type A2; and (b) being tuned over the frequency range 488 kilocycles per second to 513 kilocycles per second.

22. If high frequency reception facilities are provided, the receiver shall be capable of receiving waves of type A1 and type A2 on any frequency within the frequency band 8,266 kilocycles per second to 8,745 kilocycles per second.

23. The receiver shall be fitted with a manual gain control.

24. Headphones shall be provided and shall be shrouded to exclude noise.

25. The receiver shall comply with the requirements of items 26 to 29, inclusive, of this Schedule when tested in the following manner: (a) an artificial aerial consisting of a 40 ohm resistance in series with a 2 microhenry inductance and a 100 picofarad capacitance shall be used; (b) a signal of type A2 shall, unless otherwise specified, be modulated to a depth of 30 per centum at 400 cycles per second; and (c) the standard audio-frequency output shall be 1 milliwatt into a resistance substantially equal to the modulus of the impedance of the telephone receivers at 1,000 cycles per second.

26. (1) The selectivity of the receiver shall, at a point immediately preceding the final detector, be such that, over the frequency range 488 kilocycles per second to 513 kilocycles per second- (a) discrimination of not more than 6 decibels is obtained at frequencies removed from tune by 1 kilocycle per second; (b) discrimination of not less than 6 decibels is obtained at frequencies removed from tune by 4 kilocycles per second; (c) discrimination of not less than 30 decibels is obtained at frequencies removed from tune by 20 kilocycles per second; and (d) discrimination of not less than 60 decibels is obtained at frequencies removed from tune by 50 kilocycles per second.

(2) In the case of a superheterodyne receiver, the image response ratio shall be at least 20 decibels.

27. The sensivity of the receiver shall be such that the standard audio-frequency output is obtained with an input not exceeding the following levels: ------------------------------------------------------------------------------ -- Maximum input for waves Maximum input for waves Frequencies of type A1 of type A2 ------------------------------------------------------------------------------ -- 500 kilocycles per second . . . 40 decibels above 1 microvolt 8,364 kilocycles per second (if provided) 30 decibels above 1 microvolt 40 decibels above 1 microvolt ------------------------------------------------------------------------------ -- 28. The signal to noise ratio shall, with the inputs and waves respectively specified in the last preceding item and with the rotary converter or vibrator running, be not less than- (a) 15 decibels on the frequency of 500 kilocycles per second; and (b) 25 decibels on the frequency of 8,364 kilocycles per second, if provided.

29. (1) The fidelity of the receiver shall be such that the change in level of the audio-frequency output shall be less than 8 decibels when the modulation frequency of an input signal of constant level and modulation depth is varied continuously from 300 cycles per second to 1,500 cycles per second.

(2) The receiver shall comply with the requirement of the last preceding sub-item when the level and depth of modulation of the input signal are such that the output of the receiver does not exceed the standard audio-frequency output.

Connexions with Ships' Mains 30. Connexions of the fixed equipment with the ship's main source of electrical energy shall be so provided as not to interfere with the launching of the lifeboat.

PART 2 PORTABLE EQUIPMENT Definitions 31. In this Part, unless the contrary intention appears- "normal range of crank speeds" means the range of speeds extending from the minimum speed at which the generator will enable the transmitter forming part of the portable equipment to comply with the requirements of sub-items (5) and (6) of item 40, and item 48, of this Schedule to a speed at least of 40 per centum greater than that speed; "the portable equipment" means the equipment referred to in the next succeeding item.

Components 32. The portable radiotelegraphy equipment referred to in regulation 34 of these Regulations shall consist of- (a) a man-powered generator; (b) a transmitter; (c) a receiver; and (d) such other apparatus as is necessary for the operation of the equipment.

General 33. (1) Simple instructions for operating the portable equipment on the frequencies specified in item 37 of this Schedule and indicating the values of supply voltage and current required to operate the equipment from an external source of electrical energy shall be affixed in clear and permanent form to the portable equipment.

(2) The portable equipment shall bear a removable plate on which shall be indicated in clear and permanent form the call sign of the survival craft in letters and digits and in Morse characters.

Design and Construction 34. (1) The portable equipment shall be so designed and constructed that- (a) an unskilled person can erect the aerial system and, without difficulty and by simple operation and automatic means, transmit the radiotelegraphy and radiotelephony signals specified in sub-item (1) of item 40 of this Schedule; (b) it may be dropped in the stored condition from a height of 30 feet into water without damage; (c) it may be lowered into the sea or into a lifeboat or liferaft from the boat deck; (d) it may be secured to a lifeboat and, in the operating condition, to the person of the operator; (e) the number of manual controls is kept to the minimum required to meet the requirements of this Schedule; (f) all manual controls permit normal adjustment to be made by a person wearing thick gloves; (g) the operation of manual controls is not impeded by, and does not impede, the generation of electrical energy by the man-powered generator; (h) it is capable of being easily connected to, and operated from, an external power storage device or other source of electrical energy; (i) no damage is caused to any part of the equipment when the man-powered generator and an external source of electrical energy are connected simultaneously; (j) the occupants of the lifeboat or liferaft are suitably protected from instantaneous voltages greater than 50 volts, whether composed of direct or alternating voltages or both direct and alternating voltages; and (k) any semi-conductor devices incorporated in the equipment are effectively protected from damage due to- (i) junction temperatures exceeding the maker's recommended maximum; (ii) transient voltage changes in the power supply; (iii) sustained increase in the external power storage device voltage exceeding 25 per centum relative to the nominal battery voltage; (iv) accidental reversal of power supply polarity; and (v) radio-frequency energy from radio-frequency fields.

(2) The portable equipment shall- (a) be contained in a single unit that does not exceed 30 pounds in weight; (b) be compact, provided with handles and readily portable by one person; and (c) be watertight and capable of floating in water.

(3) The portable equipment shall have the following manual controls: (a) send/receive switches incorporating transmitter stand-by; (b) a single switch control for changing the transmitter to 500 kilocycles per second and 8,364 kilocycles per second with emissions of type A2 and to 2,182 kilocycles per second with emissions of type A3; and (c) a single manual control of receiver gain.

Aerial and Earth Systems 35. The portable equipment shall include- (a) a single-wire aerial consisting of not less than 25 feet nor more than 30 feet of high conductivity stranded or braided wire so fitted as to be capable of being supported from the lifeboat mast, without the use of topmasts, at the maximum practicable height; (b) a collapsible rod aerial of not less than 16 feet in height or an alternative aerial of approved design not greater than two inches in diameter at the base and capable of being easily and quickly installed in a lifeboat and in a liferaft; and (c) an earth wire of high conductivity not less than 12 feet nor more than 15 feet in length and securely connected to the equipment and loaded with a suitable sinker at the free end.

36. (1) The man-powered generator shall be so designed and constructed that- (a) it can be operated- (i) by one person; and (ii) by two persons simultaneously; (b) the crank cannot be rotated in the wrong direction; (c) when the crank of the generator is rotated at any speed within the normal range of crank speeds, sufficient electrical energy is generated to enable- (i) the transmitter to comply with the requirements specified in sub-items (5) and (6) of item 40 of this Schedule; and (ii) the receiver to comply with the requirements specified in item 48 of this Schedule; and (d) the transmitter complies with the requirements specified in sub-items (5) and (6) of item 40, and in item 48, of this Schedule when the torque-speed at the crank is not more than 325 expressed in pounds-feet multiplied by revolutions per minute or equivalent power for other forms of motion.

(2) An indicator that is visible at all times while the equipment is in use shall be included in the equipment to show when the generator is being operated within the normal range of crank speeds.

(3) Any external device for supplying electrical energy to the portable equipment and the container of that device- (a) shall be watertight and capable of floating in water; and (b) shall be so designed and constructed that- (i) the device and the container comply with the requirements of paragraphs (b) and (c) of sub-item (1) of item 34 of this Schedule; (ii) the device can be readily connected to the equipment so that the correct polarity is ensured; (iii) the device will not, either in the stored condition or in normal use, emit substances which may in any way be injurious to personnel or damaging to equipment or the fabric of a lifeboat or liferaft; (iv) the device is capable of supplying electrical energy over a period of seventy-two hours to- (A) the transmitter referred to in item 37 of this Schedule on full power for not less than two consecutive minutes three times per hour with intervals of eighteen minutes between transmitting periods; and (B) the receiver referred to in item 44 of this Schedule during the three intervals of eighteen minutes in each hour referred to in the last preceding clause; and (v) after storage for a period of 18 months the device is capable of meeting the requirements specified in the last preceding sub-paragraph.

Transmitter 37. The transmitter shall be capable of- (a) sending continuously, but not simultaneously, by means of waves of type A2 on the frequencies of 500 kilocycles per second and 8,364 kilocycles per second- (i) telegraph signals at all speeds up to 16 bauds; and (ii) by automatic means, the signals specified in sub-item (2) of item 40 of this Schedule; (b) sending continuously on the frequency of 2,182 kilocycles per second- (i) waves of type A3; and (ii) by automatic means, the radiotelephone alarm signal in accordance with item 39 of this Schedule; (c) maintaining over the normal range of crank speeds throughout every transmission a frequency tolerance of- (i) plus or minus 0.5 per centum on the frequency of 500 kilocycles per second; (ii) plus or minus 0.02 per centum on the frequency of 8,364 kilocycles per second; or (iii) plus or minus 0.03 per centum on the frequency of 2,182 kilocycles per second, without adjustment of any control, notwithstanding any variation of the impedance of the aerial or artificial aerial to which the transmitter is connected; and (d) operating on full power, when the aerial system or artificial aerial has been connected and the necessary controls have been adjusted, within 30 seconds after the generation of electrical energy has commenced.

38. (1) When sending on the frequency of 500 kilocycles per second or 8,364 kilocycles per second the carrier wave shall be modulated- (i) to a depth of 100 per centum; (ii) by a wave of rectangular character so that the carrier wave is transmitted for not less than 30 per centum and not more than 50 per centum of a modulation cycle; and (iii) with a note frequency not less than 450 cycles per second and not more than 1,350 cycles per second.

(2) When sending waves of type A3 on the frequency of 2,182 kilocycles per second and using a watertight microphone- (a) it shall be possible to modulate the carrier wave fully by speech; and (b) there shall be protection against serious over-modulation.

39. (1) The radiotelephone alarm signal shall consist of two alternately produced substantially sinuosidal tones of 250 milliseconds duration, plus or minus 50 milliseconds, one tone being within plus or minus 1.5 per centum of 1,300 cycles per second and the other tone being within plus or minus 1.5 per centum of 2,200 cycles per second, with the interval between successive tones not greater than 50 milliseconds.

(2) The device for generating the radiotelephone alarm signal shall be capable, with each tone, of modulating the transmitter to a depth within the range 80 per centum to 95 per centum.

(3) Means shall be provided to- (a) determine the duration of the alarm signal by manual control; (b) ensure that the device is ready, after generating the radiotelephone alarm signal, to repeat that signal after an interval of not more than two minutes; (c) generate the alarm signal within 30 seconds of the supply of energy to the alarm signal generating device; (d) give an audible reproduction of the alarm signal whenever that signal is generated; (e) test the alarm signal facility without the generation of radio-frequency energy; and (f) operate the alarm signal generator by means of not more than two external controls, each clearly labelled in permanent form to show its purpose.

40. (1) The signals to be sent by the automatic means referred to in paragraph (a) of item 37 of this Schedule are- (a) when the transmission is on the frequency of 500 kilocycles per second, the radiotelegraph alarm signal of 12 dashes each of 4 seconds duration separated by spaces of 1 second, followed by the radiotelegraph distress signal (that is to say, the Morse characters for the letters "SOS" transmitted as a single signal) repeated three times, and two dashes, each of not less than 10 seconds and not more than 15 seconds duration separated by a space of not less than 0.5 and not more than 1.5 seconds; and (b) when the transmission is on the frequency of 8,364 kilocycles per second, the radiotelegraph distress signal (that is to say, the Morse characters for the letters "SOS" transmitted as a single signal) repeated three times followed by two dashes, each of not less than 10 seconds and not more than 15 seconds duration separated by a space of not less than 0.5 and not more than 1.5 seconds.

(2) Over the normal range of crank speeds and on automatic transmission- (a) the duration of the distress signal repeated three times shall be not less than seven seconds and not more than 14 seconds; and (b) the tolerance in the timing of the dashes and spaces of the radiotelegraph alarm signal shall not exceed plus or minus 0.2 second.

(3) The automatic transmission shall cease and open the keying circuit after one complete transmission unless the mechanism is re-set or re-wound.

(4) Means shall be provided- (a) to ensure that the transmission begins at the commencement of the signal; and (b) to indicate to the operator that the mechanism should be re-set or re-wound.

(5) The mean power, not including power dissipated in any component regarded as part of the transmitter, developed by the transmitter in the load during a marking period shall be- (a) when the transmission is on the frequency of 500 kilocycles per second- (i) not less than (3.8 log10 C) minus 5.5 watts, C being the capacitance of the artificial aerial in picofarads or one watt, whichever is the greater, when measured with an artificial aerial consisting of a 15 ohm substantially non-inductive resistor in series with a capacitor having any and every value between a minimum of 10 picofarads less than that of the aerial referred to in paragraph (b) of item 35 of this Schedule and a maximum of 110 picofarads; and (ii) not less than 3.5 watts when measured with an artificial aerial consisting of a 30 ohm substantially non-inductive resistor in series with a capacitor having any and every value between a minimum of 200 picofarads and a maximum of 300 picofarads; and (b) when the transmission is on the frequency of 8,364 kilocycles per second- (i) not less than 1.5 watts when measured with an artificial aerial consisting of a 20 ohm substantially non-inductive resistor in series with a capacitor having any and every value between a minimum of 70 picofarads and a maximum of 100 picofarads; and (ii) not less than 3 watts when measured with an artificial aerial consisting of a 40 ohm substantially non-inductive resistor in series with any and every reactance within the range minus 200 ohms to plus 60 ohms.

(6) The total unmodulated carrier power, not including power dissipated in any component regarded as part of the transmitter, delivered to the load when the transmission is on the frequency of 2,182 kilocycles per second shall be- (a) not less than 1.5 watts when measured with an artificial aerial consisting of a 15 ohm substantially non-inductive resistor in series with a capacitor having any and every value between a minimum of 10 picofarads less than that of the aerial referred to in paragraph (b) of item 35 of this Schedule and a maximum of 110 picofarads; and (b) not less than 3.5 watts when measured with an artificial aerial consisting of a 30 ohm substantially non-inductive resistor in series with a capacitor having any and every value between a minimum of 300 picofarads and a maximum of 400 picofarads.

41. The aerial circuit shall include- (a) a tuning control suitable for use with all types of aerial provided; and (b) a tuning indicator the failure of which does not disconnect the aerial circuit.

42. (1) An artificial aerial suitable for testing the transmitter on full power shall be provided within the portable equipment.

(2) Means shall be provided for testing the facilities for automatic transmission without the generation of radio frequency energy.

(3) A morse key of approved design and construction shall be fitted to the portable equipment in a position suitable for manual radiotelegraph transmission.

43. The transmitter shall be so designed and constructed that, when it is transmitting and adjusted for maximum power, the aerial may be disconnected or the output short-circuited without, in either case, damage being caused to any part of the equipment.

Receiver 44. The receiver shall be- (a) a fixed tune receiver; and (b) capable of headphones reception of- (i) waves of type A2 over the frequency band 495 kilocycles per second to 505 kilocycles per second; and (ii) waves of type A3 over the frequency band 2,177 kilocycles per second to 2,187 kilocycles per second.

45. Headphones shall be permanently attached to the receiver and shall be- (a) watertight; and (b) shrouded to exclude external noise.

46. An efficient and automatic means shall be provided to limit, without introducing undue distortion, the output of the receiver during reception of strong signals.

47. The receiver shall comply with the requirements of the next succeeding item when tested in the following manner: (a) artificial aerials shall be used and shall consist of either- (i) a 15 ohm substantially non-inductive resistor in series with a capacitor having any and every value between a minimum of 10 picofarads less than that of the aerial referred to in paragraph (b) of item 35 of this Schedule and a maximum of 110 picofarads; or (ii) a 30 ohm substantially non-inductive resistor in series with a capacitor having any and every value within the range of 200 picofarads to 400 picofarads; and (b) the signals used shall be of type A2 modulated to a depth of 30 per centum at 1,000 cycles per second.

48. Over the normal range of crank speeds- (a) the standard audio-frequency output of the receiver into a resistance substantially equal to the modulus of the impedance of the headphones at 1,000 cycles per second shall be 1 milliwatt; (b) the selectivity of the receiver at a point immediately preceding the final detector shall be such that- (i) when the receiver is operating on the frequency of 500 kilocycles per second, the discrimination relative to the response at 500 kilocycles per second shall be- (A) not more than 6 decibels at all frequencies not less than 495 kilocycles per second or more than 505 kilocycles per second; and (B) not less than 40 decibels at any frequency less than 470 kilocycles per second or more than 530 kilocycles per second; and (ii) when the receiver is operating on the frequency of 2,182 kilocycles per second, the discrimination relative to the response at 2,182 kilocycles per second shall be- (A) not more than 6 decibels at any frequency not less than 2,177 kilocycles per second or more than 2,187 kilocycles per second; and (B) not less than 40 decibels at any frequency less than 2,147 kilocycles per second or more than 2,217 kilocycles per second; (c) the audio-frequency response of the receiver shall be uniform to within 8 decibels over the range of modulation frequencies 400 cycles per second to 3,000 cycles per second and shall fall substantially for frequencies outside this range; (d) the standard output specified in paragraph (a) of this item shall be obtained with a test signal input not exceeding- (i) 40 decibels above 1 microvolt on the frequency of 500 kilocycles per second; and (ii) 30 decibels above 1 microvolt on the frequency of 2,182 kilocycles per second; and (e) with the test signal specified in the last preceding paragraph, the signal to noise ratio shall be not less than 15 decibels.

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NAVIGATION (RADIO) REGULATIONS - SCHEDULE 5

SCH

SCHEDULE 5 Regulation 4 AUTO-ALARM General 1. The auto-alarm shall include- (a) a receiver; (b) a selector; (c) an audible alarm system; (d) monitoring facilities; (e) a test signal generator; and (f) a manual re-setting device to enable the selector to be re-set after the audible alarm has been actuated.

2. The auto-alarm shall- (a) in the absence of interference of any kind be capable without manual adjustment, of giving audible warning of the receipt of a radiotelegraph alarm signal that- (i) is transmitted on a frequency of 500 kilocycles per second; (ii) consists of a series of twelve consecutive dashes each with a duration in the range 3.5 to 6.0 seconds and separated by intervals of a duration in the range 0.01 second to 1.5 seconds; and (iii) has a strength at the receiver input greater than 100 microvolts and less than one volt; (b) be capable of being connected without delay with the main aerial referred to in regulation 18 of these Regulations or to the reserve aerial or to another efficient aerial; and (c) comply with the requirements of this Schedule notwithstanding variations of the supply voltage of- (i) plus 5 per centum or minus 10 per centum, if the equipment is operated from the source of electrical energy referred to in sub-regulation (5) of regulation 20 of these Regulations or from batteries; or (ii) plus or minus 10 per centum, if the equipment is operated from the supply of electrical energy referred to in sub-regulation (1) of that regulation.

3. The receiver, selector, monitoring facilities, test signal generator and manual re-setting device shall be installed in the radiotelegraph room.

Receiver 4. The receiver forming part of the auto-alarm shall be capable of receiving- (a) emissions of type A1; and (b) emissions of type A2 and type B having a note frequency not less than 400 cycles per second and not more than 1,400 cycles per second, on all carrier waves of a frequency of not less than 496 kilocycles per second and not more than 504 kilocycles per second.

5. No tuning controls shall be provided other than pre-set controls required for the initial adjustment of the receiver.

6. Gain controls which affect the operation of the selector shall be pre-set and shall not be capable of operation from the outside of the auto-alarm.

7. The following conditions shall, unless the contrary intention appears, be complied with in testing a receiver for the purposes of items 8 to 11 of this Schedule; (a) an artificial aerial consisting of a 10 ohm non-inductive resistor in series with a capacitor having any and every value between 300 picofarads and 750 picofarads shall be used; (b) signals of type A2 used in the test shall be modulated to a depth of 70 per centum and shall have a note frequency of 1,000 cycles per second; and (c) the input level shall be measured with the input injected in series with the artificial aerial.

8. The selectivity of the receiver shall be such that- (a) the radio-frequency response is uniform to within 3 decibels over the frequency range 496 kilocycles per second to 504 kilocycles per second; (b) the discrimination at all frequencies below 487 kilocycles per second and above 513 kilocycles per second is not less than 40 decibels relative to the response at 500 kilocycles per second; and (c) the auto-alarm gives response to an alarm signal of type A1 or type A2 of the frequency 500 kilocycles per second and an input level of 42 decibels above 1 microvolt in the presence of another signal having the characteristics specified in the following table: ------------------------------------------------------------------------------ -- Input level in decibels Type of Depth of above 1 wave Modulation frequency modulation Carrier frequency microvolt ------------------------------------------------------------------------------ -- A1 A2 . . Any audio frequency in the range 50 cycles per second to 1,400 cycles per second - 70 per centum Below 475 kilocycles per second and above 525 kilocycles per second 120 decibels ------------------------------------------------------------------------------ -- 9. (1) For the purposes of this item, the sensitivity of the receiver is the minimum input level of the test alarm signal that, when injected at the frequency of 500 kilocycles per second, will operate the selector.

(2) The sensivity of the receiver shall be such that the selector will operate by the injection of an alarm signal from the test signal generator forming part of the auto-alarm.

(3) The receiver shall be provided with an automatic gain control that- (a) during periods when the selector is continuously in operation, steadily reduces the sensitivity of the receiver, the rate of reduction never going outside the limits of 7.5 decibels to 15 decibels per minute for a range of sensitivity of 40 to 70 decibels above 1 microvolt, even though the input level of an injected signal is at any level above the minimum necessary to operate the selector; and (b) during periods when the selector is not continuously in operation, steadily increases the sensitivity of the receiver to a value not less than 35 decibels above 1 microvolt and not more than 40 decibels above 1 microvolt, the rate of increase never going outside the limits of 30 decibels to 60 decibels per minute for a range of sensitivity of 40 decibels to 70 decibels above 1 microvolt even though the input level of an injected signal is at any level below the level corresponding to the threshold of selector release.

10. The automatic gain control, when Morse interference is simulated by continuous keying of a test signal of the frequency of 500 kilocycles per second and an input level of 100 decibels above 1 microvolt with a mark-to-space ratio of 19 to 1 and variation of frequency of interruption is obtained by varying the speed of transmission, shall be such that- (a) when the test signal produces three interruptions during each second, the sensitivity of the receiver is not reduced below that necessary for the reception of a signal of an input level of 40 decibels above 1 microvolt; and (b) when the test signal produces three interruptions during each period of 2 seconds, the sensitivity of the receiver is progressively reduced so that after a period of 15 minutes a signal of at least 70 decibels above 1 microvolt is required to operate the selector.

11. If, in addition to the automatic gain control, a pre-set manual control of receiver gain is provided, the range of sensitivity variations provided by that control shall not exceed 10 decibels.

12. The receiver shall be such that the auto-alarm responds reliably to a test alarm signal transmitted on any frequency in the range 496 kilocycles per second to 504 kilocycles per second and at an input level of 50 decibels above 1 microvolt in the presence of an interfering signal having the characteristics specified in the following table: ------------------------------------------------------------------------------ -- Frequency of Type of Depth of interfering signal signal modulation Modulation frequency Input level Speed of transmission ------------------------------------------------------------------------------ -- Any frequency in the range 496 to 504 kilocycles per second A1 A2 - 70 per centum - Any audio frequency in the range 400 cycles per second to 1,400 cycles per second 120 decibels above 1 microvolt Not less than 15 or more than 40 words per minute ------------------------------------------------------------------------------ -- 13. The receiver shall be so constructed that it does not operate the selector upon the simultaneous injection of two continuous carrier waves- (a) of which the frequency difference or sum is within the range 496 kilocycles per second to 504 kilocycles per second; (b) each of which has a frequency outside the range 475 kilocycles per second to 525 kilocycles per second; (c) each of which has an input level of 120 decibels above one microvolt; and (d) one of which is unmodulated and the other of which is modulated to a depth of 70 per centum at any audio frequency in the range 400 cycles per second to 1,400 cycles per second.

14. (1) The receiver shall be such that, when the test signal generator is not in operation, the receiver does not in normal service produce a field exceeding 0.1 microvolt per metre when measured at a distance of 1 mile from the receiver.

(2) The receiver shall be deemed to comply with the requirements of the last preceding sub-item if, in the circumstances set out in the following paragraphs, the power measured by the measuring instrument does not exceed 4 x 10*-10* watts, whatever the resistance of the measuring instrument or the adjustment of the receiver and notwithstanding that the search coil is short-circuited or moved in any way other than a way that causes it to approach within 6 inches of the receiver case: (a) the receiver is placed centrally in a screened earthed enclosure at least 6 feet cube; (b) the earth terminal of the receiver is connected to the inside of the screen; (c) the aerial terminal of the receiver is connected through an unscreened four-turn rectangular search coil 1 foot square situated within the enclosure and an unscreened lead to a resistive measuring instrument mounted outside the enclosure and having its other terminal earthed; (d) the receiver is energized; and (e) if the receiver is capable of headphone reception, unscreened headphones are connected to it.

Monitoring Facilities 15. The receiver forming part of the auto-alarm shall be provided with facilities for headphone and loudspeaker reception of signals of type A2.

16. The standard audio frequency output level of the receiver shall be- (a) for headphone reception-1 milliwatt into a resistance substantially equal to the modulus of the impedance of the telephone receivers at 1,000 cycles per second; and (b) for loudspeaker reception-50 milliwatts into a resistance substantially equal to the modulus of the impedance of the loudspeaker at 1,000 cycles per second.

17. The receiver shall be capable of producing the standard output level with an input signal having the characteristics specified in the following table: ------------------------------------------------------------------------------ -- Type of Frequency of signal signal Input level ------------------------------------------------------------------------------ -- 500 kilocycles per second A2 Any level in the range 40 decibels above 1 microvolt to 120 decibels above 1 microvolt ------------------------------------------------------------------------------ -- 18. The method of connection of loudspeaker and headphones shall be such that- (a) the loudspeaker shall be rendered inoperative when the headphones are connected for reception; and (b) the connection and disconnection of the headphones and the loudspeaker shall not affect the performance of the auto-alarm.

19. The receiver shall be provided with a manual control of audio-frequency gain effective on both headphone and loudspeaker reception and so arranged that the performance of the auto-alarm is not impaired at any setting of the control.

Test Signal Generator 20. (1) The test signal generator shall be capable of generating, for the purpose of test, a signal having the characteristics specified in the following table: ------------------------------------------------------------------------------ -- Type of Frequency of signal signal Input level ------------------------------------------------------------------------------ -- Within the range 497-503 kilocycles per second A1 Equivalent to a voltage within the range 37 decibels to 43 decibels above 1 microvolt in series with the artificial aerial ------------------------------------------------------------------------------ -- (2) The test signal generator shall be capable of injecting into the receiver the alarm signal specified in paragraph (a) of item 2 of this Schedule and having the characteristics specified in the last preceding sub-item by means of- (a) a manual key of the non-locking type; and (b) the automatic keying device specified in the First Schedule.

(3) The method of injection shall be such that any test alarm signal having the characteristics specified in sub-item (1) of this item does not cause the audible alarm system to operate if the aerial is disconnected from the receiver.

21. The test signal generator shall be so designed and constructed that the input level of the signal specified in sub-item (1) of the last preceding item can be increased by approximately 20 decibels by means of a non-locking switch.

Selector 22. The selector, in conjunction with the receiver, shall be capable of- (a) accepting dashes of a duration in the range 3.5 to 6.0 seconds, and spaces between dashes, being spaces of a duration in the range 0.01 second to 1.5 seconds; and (b) rejecting dashes of a duration of not more than 3.4 seconds and not less than 6.2 seconds and spaces between dashes, being spaces of a duration of not less than 1.6 seconds.

23. (1) The selector shall actuate the audible alarm system only after correct registration of the chosen number of consecutive dashes of the alarm signal.

(2) For the purposes of the last preceding sub-item, the chosen number of consecutive dashes shall be either three or four.

(3) The selector shall be deemed to have correctly registered the fourth consecutive dash if the duration of that dash was not less than 3.5 seconds.

24. Any timing controls provided as part of the selector shall be pre-set and shall not be capable of being operated from the outside of the equipment.

Audible Alarm System 25. (1) The audible alarm system shall consist of three alarm bells, one installed in the radiotelegraph room, one on the bridge and the third in the sleeping quarters of a radio officer.

(2) The bells shall be operated from the source of electrical energy referred to in sub-regulation (5) of regulation 20 of these Regulations by means of a power circuit taken from an unfused circuit and so fused that the efficiency of the audible alarm system can not be affected by the rupture of a fuse other than a fuse forming part of that system.

26. Each alarm bell shall, unless it has been disconnected in accordance with item 28 of this Schedule or unless there has been a failure of the reserve source of energy referred to in sub-item (2) of the last preceding item, be capable of giving an alarm- (a) when actuated by the selector; (b) within 15 seconds of the commencement of a failure that continues for at least three seconds- (i) of the principal direct current supply voltage to the equipment; (ii) of the output of any vibrator forming part of the equipment; (iii) in the circuit of a filament of a directly heated valve forming part of the equipment, being a valve that is not energized directly from a battery; or (iv) of a continuously rotating mechanism forming part of a selector, being a mechanism that is not energized directly from a battery; and (c) within 15 seconds of a failure- (i) in a circuit of a filament of a directly heated valve forming part of the equipment, being a valve that is energized directly from a battery; or (ii) of a continuously rotating mechanism forming part of a selector, being a mechanism energized directly from a battery.

27. The equipment shall not require manual re-setting unless the audible alarms have been actuated.

28. A device shall be provided that enables the bells situated on the bridge and in the sleeping quarters of a radio officer to be disconnected from the power circuit, and shall be non-locking, but shall not be capable of disconnecting the bell in the room from which the radiotelegraphy installation is operated.

29. The power circuit provided to operate the bells of the audible alarm system shall be controlled by the switch that brings the system into operation.

30. No switch or device, other than the device referred to in paragraph (f) of item 1 of this Schedule, the device referred to in item 28 of this Schedule or the switch referred to in the last preceding item, shall be provided for the purpose of de-energizing the audible alarm system.

31. The device referred to in paragraph (f) of item 1 of this Schedule, the device referred to in item 28 of this Schedule and the switch referred to in item 29 of this Schedule shall be clearly and permanently marked to indicate their purposes.

Field Tests 32. The auto-alarm shall be such that, when it is in operation for a period of 28 days in connexion with an aerial having an effective height of not less than 10 metres at a location nominated by the Minister, the auto-alarm is not actuated during that period by signals other than- (a) signals locally generated to test the auto-alarm; or (b) signals within the tolerances specified in paragraph (a) of item 22 of this Schedule.

Additional Safeguards to be Incorporated when the Equipment Includes Semi-conductor Devices 33. Where semi-conductor devices are incorporated in the auto-alarm- (a) the maker's maximum ratings for each types of semi-conductor device shall not, in any respect, be disregarded, and in particular, the recommended junction temperature shall not be exceeded; (b) adequate screening and filtering shall be provided to protect the devices from damage due to radio frequency energy; and (c) the devices shall be effectively protected from damage due to- (i) transient changes in the power supply voltage; (ii) accidental reversal of the power supply polarity; and (iii) a sustained increase in the power supply voltage of 25 per centum relative to the nominal battery voltage when the equipment is operated from a battery of secondary cells.

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NAVIGATION (RADIO) REGULATIONS - SCHEDULE 6

SCH

SCHEDULE 6 Regulations 15 and 31 RADIO LOG-BOOK PART I ------------------------------------------------------------------------------ -- Official number and Name of Ship international call sign Port of registry Gross tonnage ------------------------------------------------------------------------------ -- ------------------------------------------------------------------------------ -- Name of company operating the radio service................................... ------------------------------------------------------------------------------ -- Port at which, and date when, Nature of the voyage or Port at which, and date when, voyage commenced employment voyage terminated ------------------------------------------------------------------------------ -- ------------------------------------------------------------------------------ -- SECTION A-PARTICULARS OF RADIO STAFF ------------------------------------------------------------------------------ -- Name Home address Certificate number and class ------------------------------------------------------------------------------ -- ------------------------------------------------------------------------------ -- SECTION B-PARTICULARS OF BATTERIES ON BOARD ------------------------------------------------------------------------------ -- Voltage and Number of ampere-hour Purpose for which Battery number cells Type Date supplied capacity used ------------------------------------------------------------------------------ -- ------------------------------------------------------------------------------ -- SECTION C-DAILY EXAMINATION OF BATTERIES ------------------------------------------------------------------------------ -- Date Battery number Voltage off load Voltage on load Remarks ------------------------------------------------------------------------------ -- ------------------------------------------------------------------------------ -- SECTION D-MONTHLY REPORT OF BATTERIES ------------------------------------------------------------------------------ -- Specific gravity Specific gravity Battery as measured Battery as measured number --------------- number -------------- and cell Before After and cell Before After Date number charge charge Remarks Date number charge charge Remarks ------------------------------------------------------------------------------ -- ------------------------------------------------------------------------------ -- PART II ------------------------------------------------------------------------------ -- Official number and Name of ship international call sign Port of registry Gross tonnage ------------------------------------------------------------------------------ -- ------------------------------------------------------------------------------ -- Serial number...................... from.....................to...............

Name of company operating the radio service...................................

DIARY OF THE RADIOTELEGRAPH SERVICE ------------------------------------------------------------------------------ -- Full details of Date and time calls, signals and (G.M.T.) Station from Station to distress working Frequency ------------------------------------------------------------------------------ -- ------------------------------------------------------------------------------ --

NAVIGATION (RADIO) REGULATIONS - SCHEDULE 7

Substituted by 1978 No. 122 r. 4

SCH

SCHEDULE 7 Regulation 26 TABLE OF RADIO WATCH HOURS PART A Times of radio watch for ships required to maintain radio watch of 16 hours each day (Ship's time) 0000h to 0400h 0800h to 1200h 1600h to 1800h 2000h to 2200h (together with 4 hours of radio watch to meet the essential communication needs of the ship having regard to radio transmission propagation conditions and traffic requirements).

PART B Times of radio watch for ships required to maintain radio watch of 8 hours each day (Ship's time) 0800h to 1200h 2 continuous hours between 1800h and 2200h (together with 2 hours of radio watch to meet the essential communication needs of the ship having regard to radio transmission propagation conditions and traffic requirements).

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