Manual of Standards Part 172 Amendment (No. 1) 2008 (Cth)

I, WILLIAM BRUCE BYRON, Director of Aviation Safety, on behalf of CASA, make this instrument under regulation 172.022 of the Civil Aviation Safety Regulations 1998.

[Signed Bruce Byron]

Bruce Byron
Director of Aviation Safety and
    Chief Executive Officer

19 November 2008

Manual of Standards Part 172 Amendment (No. 1) 2008

1          Name of instrument

            This instrument is the Manual of Standards Part 172 Amendment (No. 1) 2008.

2          Commencement

This instrument commences on 20 November 2008.

3          Amendment of Manual of Standards Part 172

            Schedule 1 amends Manual of Standards Part 172.

Schedule 1          Amendments

[1]       Paragraph 10.6.9.2 (c)

substitute

(c)   RAIM loss or loss of integrity, for more than 5 minutes; or

(d)   operation of the GPS receiver in dead reckoning mode, for more than 1 minute; or

(e)   loss of the GPS receiver navigation function, for more than 1 minute.

[2]       Subsection 10.6.9.4

omit

[3]       Subsection 10.6.9.6

omit

[4]       Subsection 10.8.3.9

substitute

10.8.3.9The following circular error of position (CEP) and cross track tolerances are applicable to long range navigation systems, subject to the conditions specified:

Table 10.8-4

Tolerance

Conditions

25 NM CEP

1   Aircraft flight notification must indicate RNP10 or RNP4.

2   Only useable for separation with the 25 NM CEP tolerance of another RNP10 or RNP4 aircraft.

3   1 NM buffer between tolerances is not required.

14 NM CEP

1   Not useable in airspace designated OCA.

2   Aircraft flight notification must indicate AUSEP, RNP10 or RNP4.

7 NM CEP

1   Not useable in airspace designated OCA.

2   Aircraft flight notification must indicate GPSRNAV or GPSOCEANIC.

Expanding formula

1   Not useable in airspace designated OCA.

2   Aircraft flight notification must indicate:

      (a)  INS/IRS; and

      (b)  AUSEP, RNP10 or RNP4.

3   CEP tolerance is a circle of radius:

      (a)  3 NM on departure, or 4 NM at each update; and

      (b)  expanding at a rate of 3 NM per hour since departure or update, to a maximum of 14 NM radius.

4   Any lateral separation diagram so produced must be approved by the ATS provider.

5   Unless informed otherwise, ATC may assume update when 1 of the following occurs:

      (a)  aircraft passage within 180 NM of 2 DME stations for a DME/DME fix where the position lines cross at an angle between 30° and 150°;

      (b)  aircraft passage within 25 NM of a collocated VOR/DME beacon;

      (c)  aircraft passage over a VOR beacon at or below FL200.

± 30 NM Cross track

Aircraft flight notification must indicate:

      (a)  INS/IRS; and

      (b)  AUSEP, RNP10 or RNP4.

±15 NM Cross track

1   Aircraft flight notification must indicate:

      (a)  INS/IRS; and

      (b)  AUSEP, RNP10 or RNP4.

2   The update interval (that is, the flight time since departure or a waypoint suitable for updating present position) does not exceed:

      (a)  for aircraft equipped with single INS/IRS — 3 hours; or

      (b)  for aircraft with 2 or more INS/IRS — 5 hours.

[5]       Subsection 10.9.2.1

omit