Navigation (Direction-Finders) Regulations (Cth)
STATUTORY RULES.
REGULATIONS UNDER THE NAVIGATION ACT 1912-1956.*
Dated this twenty sixth
day of June , 1959.
W. J. Slim
Governor-General.
By His Excellency’s Command,
Minister of State for Shipping and Transport.
NAVIGATION (DIRECTION-FINDERS) REGULATIONS.
“mile” means nautical mile;
“radio surveyor” means a person, being a person skilled with regard to radio navigational aids, appointed under section 190 of the
Navigation Act 1912-1956 to be a surveyor;“ship” means a ship of not less than one thousand six hundred tons which is—
(
(
(
c ) engaged in the carriage of passengers from a port in Australia to a port outside Australia,but does not include—
(
d ) 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;
(
e ) a passenger ship of less than four thousand tons not engaged on international voyages;
* Notified in the
6835/56.—Price 8d 6/28.5.1959
(
f ) a cargo ship of less than six thousand tons not engaged on international voyages;(
g ) a river and bay ship;(
h ) a sailing ship; or(
i ) a fishing boat.
(2.) In these Regulations—
(
a ) a reference to the tonnage of a ship shall be read as a reference to the gross registered tonnage of that 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 or signal of type A1 shall be read as a reference to radiotelegraphy by the keying of a continuous wave on and off;(
d ) a reference to a wave 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, and(
e ) a reference to type B waves shall be read as a reference to damped waves.
(a) has been installed before the date of commencement of these Regulations;
(
b ) complies with the requirements of Article 47 and paragraph 17 of Article 31 of the International Convention for the Safety of Life at Sea signed in London on the thirty-first day of May, 1929; and(
c ) is capable of—(i) receiving waves of types Al, A2 and B on all frequencies from and including two hundred and fifty-five kilocycles per second to and including five hundred and twenty-five kilocycles per second; and
(ii) taking radio bearings when the field strength at the loop aerial system is as low as fifty microvolts per metre.
(
a ) comply with the requirements specified in the First Schedule; and(
b ) be such that it is free from mechanical defects and complies with the requirements of paragraphs 4 and 5 and 7 to 21 (inclusive) of the First Schedule—(i) when undergoing the vibration, dry heat and low temperature tests in accordance with the Second Schedule;
(ii) when subjected to the damp heat test in accordance with that Schedule; and
(iii) immediately after undergoing, in accordance with that Schedule, such other tests specified in that Schedule as are applicable.
(2.) The loop aerial system forming part of a direction-finder shall be such that, after undergoing the mould growth test in accordance with the Second Schedule, mould growth is not present on it.
(3.) A direction-finder shall be capable of efficiently determining radio bearings at all times while the ship in which it is installed is at sea notwithstanding such interference or mechanical noise as is produced by the direction-finder.
(2.) The loop aerial system forming part of a direction-finder shall be so mounted that the efficient determination of radio bearings by means of the direction-finder is hindered as little as possible by the proximity of aerials, derricks, wire halyards and other large metal objects.
(3.) The feeder cables connecting the loop aerial system with the receiver forming part of a direction-finder shall, unless they consist of solid-dielectric screened cable, be protected by metal tubes which are bonded to earth.
(4.) The joints of the feeder cables shall be watertight.
(2.) Where batteries are provided as a source of electrical energy for the operation of a direction-finder, equipment shall be provided on board the ship for charging those batteries and the ship’s main source of electrical energy shall be available for that purpose.
(2.) An efficient means of signaling shall be provided between the receiver forming part of the direction-finder and the ship’s standard compass or gyro compass repeater, if any.
(
a ) as soon as practicable after it has been installed in the ship; and(
b ) as soon as practicable after any change is made in the position of the loop aerial system forming part of the direction-finder.
(2.) A direction-finder shall be calibrated by two persons, one being experienced in taking radio bearings and the other in taking visual bearings, in the following manner:—
(
a ) the calibration shall be carried out by taking simultaneously visual bearings upon a calibrating transmitter and radio bearings upon that transmitter by means of the direction-finder—(i) the ship being either swung through a complete circle or circled by another ship carrying the calibrating transmitter; and
(ii) the bearings being taken throughout three hundred and sixty degrees at intervals of five degrees or as close to those intervals as is practicable;
(
b ) the calibrating transmitter upon which the bearings are taken, whether it is situated on shore or on board another ship, shall be a transmitter operating on a frequency of not less than two hundred and eighty-five kilocycles per second and not more than three hundred and fifteen kilocycles per second; and(
c ) calibration tables and curves shall be prepared on the basis of the bearings taken.
(
a ) at intervals not exceeding twelve months; and(
b ) whenever a change is made in any structure or fitting on deck which is likely to affect the accuracy of the calibration tables or curves.
(2.) If the verification referred to in the last preceding sub-regulation shows that the calibration tables or curves are materially inaccurate, the direction-finder shall, as soon as practicable, be recalibrated in the manner specified in the last preceding regulation.
(
a ) a list or diagram indicating the condition and position, on the most recent occasion on which the direction-finder was calibrated, of the aerials, and all movable structures, on board the ship which might affect the accuracy of the direction-finder;(
b ) the calibration tables and curves which were prepared on the most recent occasion on which the direction-finder was calibrated;(
c ) a certificate of calibration, in the form specified in the Third Schedule, relating to the most recent occasion on which the direction-finder was calibrated, and signed by the persons making the calibration; and(
d ) a record, in the form specified in the Fourth Schedule, of check-bearings taken for the verification of calibration, the bearings being numbered in the order in which they were taken.
Penalty: One hundred pounds.
Penalty: One hundred pounds.
Penalty: One hundred pounds.
(
a ) for a purpose other than the business of the ship; or(
b ) for keeping the radio watch required to be kept by the Navigation (Radio) Regulations.
Penalty: One hundred pounds.
THE SCHEDULES. Regulation 6.
FIRST SCHEDULE.
Direction-finder.
1. For the purposes of this Schedule—
(a) “locally generated signals” means signals obtained from a signal generator or signal generators; and
(b) a goniometer forming part of a direction-finder shall, except for the purposes of paragraph 13 of this Schedule, be deemed to be part of the loop aerial system.
2. The direction-finder shall include a receiver and a loop aerial system.
3. The loop aerial system, other than ball bearings, hose clips, set screws and other similar small parts, shall consist of non-magnetic material.
4. The direction-finder shall be capable of headphone reception of waves of type A1, type A2 and type B of any frequency within the range 255 kilocycles per second to 525 kilocycles per second so as to enable the radio bearing and sense of the signal to be determined by reference to its minimum strength.
5. The receiver shall be provided with—
(a) a radio-frequency gain control;
(b) a tuning control; and
(c) a tuning scale in which, at no point in the tuning range, an interval of ⅛ inch corresponds to a frequency change of more than 8 kilocycles per second.
6. The receiver shall comply with the Requirements of paragraphs 7 to 18 (inclusive) of this Schedule when tested in the following manner on any frequency within the range 255 kilocycles per second to 525 kilocycles per second:—
(a) Locally generated signals shall be injected through a network in such a manner that the signal generator or generators, as the case may be, and the network are together equivalent to a constant voltage generator in series with an impedance substantially equal to the impedance of the loop aerial system at the test frequency, when—
(i) the loop aerial system is adjusted for the determination of radio bearings;
(ii) the sense-finder is not in operation; and
(iii) the impedance is measured between the two terminals to which the receiver is normally connected.
(b) The effective height (
h e) in metres of the loop aerial system shall be the ratio E/e, where “E” is the voltage produced by a vertically polarized field of strength “e” volts per metre when—(i) the loop aerial system is adjusted for the determination of bearings and for maximum pick-up;
(ii) the sense-finder is not in operation;
(iii) the receiver is not connected to the loop aerial system; and
(iv) the voltage is measured between the terminals of the loop aerial system to which the receiver is normally connected.
(c) The standard input level shall be the input level obtained when the electromotive force of the equivalent signal generator referred to in subparagraph (a) of this paragraph is 50
h e microvolts root mean square.(d) The standard output level shall be an audio-frequency output of 1 mill watt into a resistance substantially equal to the modulus of the impedance of the telephone receivers at 1,000 cycles per second.
First Schedule—
continued .(e) The signal-noise ratio of the direction-finder shall be determined either—
(i) by using vertically polarized waves for transmission of the input signal, and with the loop aerial system arranged for the determination of bearings and adjusted for maximum pick-up, but without the sense-finder in operation; or
(ii) by using locally generated signals applied to the receiver only in the manner specified in sub-paragraph (a) of this paragraph.
(a) The minimum bandwidth for 6 decibels discrimination shall be 2 kilocycles per second.
(b) The maximum bandwidth in relation to discrimination shall be in accordance
with the following table:—
|
|
|
|
|
|
|
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(c) At a frequency outside the bandwidth of 35 kilocycles per second the discrimination shall not be less than 90 decibels except in the case of superheterodyne receivers where, at the image frequency, the discrimination shall not be less than 80 decibels.
8. The gain of the receiver shall be such that, when—
(a) the input terminals of the receiver are closed solely through an external impedance substantially equal to that of the loop aerial system at the test frequency;
(b) the sense-finder is not in operation; and
(c) impedance is measured between the two terminals of the loop aerial system to which the receiver is normally connected,
receiver noise can produce an output level of minus 10 decibels relative to the standard output level at any frequency within the range of frequencies specified in paragraph 4 of this Schedule.
9.—(1.) The signal-noise ratio shall not be less than 20 decibels when—
(a) the note filter (if any) is switched out of circuit;
(b) a type A1 signal is injected at the standard input level; and
(c) the receiver gain is manually adjusted to give the standard output level.
(2.) The signal-noise ratio shall not be less than 10 decibels when—
(a) the note filter (if any) is switched out of circuit;
(b) a type A2 signal modulated to a depth of 30 per centum with a frequency of 400 cycles per second is injected at the standard input level; and
(c) the receiver gain is manually adjusted to give the standard output level.
(3.) For the purposes of this paragraph, spurious whistles shall be regarded as noise.
10. The change in output of the receiver shall not exceed 3 decibels—
(a) at any frequency within the range of frequencies specified in paragraph 4 of this Schedule; and
(b) at all levels of a wanted signal up to 50 decibels above the standard input level, whether of type A1 or type A2, when locally generated signals of type A1 or type A2 at a level of 40 decibels above the level of the wanted signal and spaced 10 kilocycles per second from the carrier of the wanted signal are applied.
First Schedule—
11. The input level of each of two unwanted signals shall not be less than plus 75 decibels relative to the standard input level when—
(a) the receiver is adjusted to give standard output level with a locally generated wanted signal of standard input level modulated to a depth of 30 per centum with a note frequency of 400 cycles per second at any frequency within the range of frequencies specified in paragraph 4 of this Schedule;
(b) the input wanted signal has been removed; and
(c) two unwanted locally generated signals—
(i) each of which is of a frequency not less than 50 kilocycles per second from the frequency of the wanted signal;
(ii) the frequency sum or frequency difference of which is equal to the frequency of the wanted signal; and
(iii) one of which is modulated to a depth of 30 per centum with a note frequency of 400 cycles per second and the other is unmodulated,
are applied simultaneously at equal input levels so as to give an output equal to that previously obtained with the wanted signal.
12. The direction-finder shall not in normal service produce a field exceeding 0.1 microvolt per metre when measured at a distance of 1 mile from the receiver.
13. The direction-finder shall be deemed to comply with the last preceding paragraph if, when—
(a) the receiver, with the goniometer (if any) but without the aerial system, is placed centrally in a screened earthed enclosure at least 6 feet cube;
(b) the earth terminal is connected to the inside of the screen;
(c) each aerial terminal in turn is connected through an unscreened 4-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 aerial terminal or terminals of the receiver, other than the terminal connected to the measuring instrument, are earthed one at a time or in any combination or remain unearthed or are interconnected in any combination; and
(e) the receiver is energized and unscreened headphones are connected to it,
the power measured by the
measuring instrument, when connected in the manner specified in sub-paragraph
(c) of this paragraph, does not exceed 4 x 10
14. After the receiver has been switched on for 5 minutes and tuned to any frequency within the frequency range specified in paragraph 4 of this Schedule the tune, frequency shall not change by more than 1 part in 1,000 in any period of 5 minutes.
15. A change of 5 per centum in any one of the supply voltages to the receiver, or to a power unit associated with the supply voltages, shall not cause the tune frequency to change by more than 3 parts in 10,000.
16. A change of ambient temperature of 5 degrees Centigrade within the range 0 degrees Centigrade to 50 degrees Centigrade applied after the receiver has been switched on for 1 hour shall not cause the tune frequency to change by more than 1 part in 1,000.
17. The heterodyne note stability of the receiver shall be such that—
(a) the frequency of a heterodyne note which is initially 1 kilocycle per second shall not vary by more than 100 cycles per second when an input signal is increased over a range of levels from 0 to 60 decibels above the standard input; and
First Schedule—
(b) at all input levels within the range specified in the last preceding sub-paragraph, a beat note of 200 cycles per second can be obtained by tuning either towards or away from zero beat.
18. The maximum change in level of the output of the receiver shall be less than 8 decibels when—
(a) the modulation frequency of an input signal of constant level and modulation depth, applied at a level in the range from the standard input level to 50 decibels above the standard input level, is varied continuously from 300 cycles per second to 1,500 cycles per second; and
(b) the output of the receiver does not exceed the standard output level.
19. The bearings indicated by the scale of the direction-finder shall, at all frequencies in the range of frequencies specified in paragraph 4 of this Schedule, throughout the whole 360 degrees of azimuth and after due allowance has been made for site errors, be correct within plus or minus 1 degree of the true bearing when the direction-finder is tested using type A2 waves modulated to a depth of from 80 per centum to 100 per centum and with a vertically polarized field having a level of 40 decibels relative to 1 microvolt per metre.
20. Changes in the setting of the bearing indicator of the direction-finder 5 degrees and 90 degrees in either direction from the position or positions of minimum output shall, at all frequencies in the range of frequencies specified in paragraph 4 of this Schedule, cause the audio-frequency output to increase by not less than 18 decibels and not less than 35 decibels, respectively, when the direction-finder is arranged for the taking of bearings and is tested under the conditions specified in the last preceding paragraph, but with a field strength sufficient to give a signal/noise ratio of not less than 50 decibels with the loop aerial system adjusted for maximum output.
21. The audio-frequency output level of the receiver due to the wanted signal shall, when—
(a) the direction-finder is adjusted for the determination of sense, and is tested under the conditions specified in paragraph 19 of this Schedule, but with a field strength sufficient to give a signal/noise ratio of not less than 50 decibels with the loop aerial system adjusted for maximum output; and
(b) the sense indicator is adjusted to indicate any bearing within plus or
minus 10 degrees of the true bearing,
be not less than 20 decibels below the output level that is obtained when the sense indicator is adjusted to indicate a bearing within 180 degrees plus or minus 10 degrees of the true bearing.
SECOND SCHEDULE. Regulation 6.
Climatic and Durability Tests.
1. In this Schedule—
(a) a reference to Class B equipment shall be read as a reference to parts of
the direction-finder other than the loop aerial system; and
(b) a reference to Class X equipment shall be read as a reference to the
loop aerial system of the direction-finder.
2.—(1.) Subject to this paragraph—
(a) Class B equipment shall be subjected to the tests specified in the first column
of the table in this sub-paragraph; and
(b) Class X equipment shall be subjected to the tests specified in the second
column of that table,
Second Schedule—
in the order indicated by the numbers preceding the references to those tests in those columns.
First Column. | Second Column. |
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. Immersion test |
8. Corrosion test (salt water) | |
| |
10. Mould growth test |
(2.) Class X equipment that has been subjected to the rain test at a static pressure of not less than 45 pounds per square inch or more than 55 pounds per square inch shall not be subjected to the immersion test.
(3.) 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 the last preceding paragraph shall be conducted in accordance with the succeeding provisions of this Schedule.
4. The equipment, complete with its chassis covers and shock absorbers (if any), and in its normal operating position, shall be clamped to a vibration table.
5. The table shall be vibrated at all frequencies between 0 and 12.5 cycles per second at an amplitude of plus or minus 0.16 centimetre while the equipment is kept working continuously.
6. The table shall be so vibrated for 3 periods each of 8 minutes’ duration.
7. The direction of the vibration during each period referred to in the last preceding paragraph shall be perpendicular to the direction of the vibrations during the other two periods:
8. 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.
9. Class X equipment shall be placed in a chamber which 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.
10. The chamber shall then be cooled to a constant temperature of 55 degrees Centigrade, within a tolerance of plus or minus 1 degree Centigrade, and the direction-finder shall be kept working continuously at that temperature for a period of 2 hours.
11. 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.
12. 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.
Second Schedule—
13. 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.
14. 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.
15. 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.
16. 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.
17. 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.
18. 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.
4 holes on the periphery of a circle of 1.3 centimetres diameter.
19. 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.
20. Fresh water at room temperature and at a static pressure—
(a) not being less than 15 pounds per square inch or more than 25 pounds per square inch, if the equipment is to be subjected to the immersion test; or
(b) not being less than 45 pounds per square inch or more than 55 pounds per square inch, in any other case, 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.
21. 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.
22. 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.
23. Upon its removal from the water the equipment shall be drained of water:
24. 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 |
25. The spraying apparatus shall be such that the products of corrosion cannot mix with the sea water or solution contained in the spray reservoir.
Second
Schedule—
26. 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.
27. 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.
28. The equipment shall be so sprayed and stored on four separate occasions.
29. A battery included in the equipment shall be fully charged and then fitted into the equipment.
30. 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.
31. 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.
32. 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. |
33. 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.
THIRD SCHEDULE.
Regulation 15 (c):
Navigation (Direction-Finders) Regulations.
CERTIFICATE OF CALIBRATION OF DIRECTION-FINDER.
We, the undersigned, hereby certify that we have this day—
(a) calibrated, in accordance with the Navigation (Direction-Finders) Regulations, the direction-finder installed in the ship ;
(b) handed to the Master of that ship tables of calibration corrections; and
(c) adjusted the direction-finder so that the readings taken by it, when corrected with the tables, differed from the correct bearings by no more than plus or minus 2 degrees.
We further certify that the Master of the above-mentioned ship has been furnished with a list or diagram indicating the condition and position, at the time of the calibration, of the aerials and of all movable structures on board the ship which might affect the accuracy of the direction-finder.
Dated this day of 19 .
Radio Observer.
Visual Observer.
FOURTH SCHEDULE. Regulation 15 (
d )
RECORD OF CHECK-BEARINGS TAKEN BY MEANS OF THE DIRECTION-FINDER.
Serial Number of Bearing. | Date. | Time (Greenwich Mean Time). | Ship’s Approximate Position. | Distance from Trans-mitter. | Ship or place in or at which Transmitter situated. | Direction finder Relative Bearing Corrected for Quad-rantal Error. | Ship’s Head by Compass 0°/360°. | Total Compass Error. | Half Convergency Applied. | Ship’s Head Corrected (True). | True Bearing by Direction finder (Col. (8) and Col (12) ). | True Bearing by Visual Check. | Correction required to make Col. (13) equal Col. (14) (indicating whether – or +). | Signatures of Observers. | |
Latitude. | Longitude. | ||||||||||||||
(7) | (8) | (9) | (10) | (11) | (12) | (13) | (14) | (15) | (16) | ||||||
(1) | (2) | (3) | (4) | (5) | (6) | ||||||||||
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