Document ID: chunk:federal_register_of_legislation:F2022C00813:reg:300:p1
Version: federal_register_of_legislation:F2022C00813
Segment Type: reg
Provision Reference: reg 300 (pt 1/27)
Character Range: 71272–75042

300                                   (b) either:
                                           (i) an ILS classified at least II/D/2; or
                                           (ii) taking into account any associated operating limitation, a precision approach facility that has performance characteristics at least equivalent to an ILS classified at least II/D/2.
                                                                                                                                                                                                                                       Precision approach runway Category III.
Precision approach Category IIIA  175                                                                                                                                                                                                  Precision approach Category II and III lighting system.
                                                                                                                                                                                                                                       RVR sensors at all zones.
Precision approach Category IIIB  75
Precision approach Category IIIC  Not applicable in the Australian environment.

Note: Visibility values for Special Authorisation Category I procedures and Special Authorisation Category II procedures are stated at paragraphs 8.1.14 and 8.1.15.

8.1.6.3 Circling. Circling visibility must be determined from Table 8-2. (The basis upon which the values for circling visibility have been determined are contained in Table 8-2A.)
Table 8‑2: Circling visibility
Aircraft Category         A    B    C     D     E
Circling Visibility (km)  2.0  2.4  4.00  5.00  7.00

Note: The values in Table 8-2 have been determined allowing for an omni directional wind of 25 knots, an achieved bank angle of 25°, an OAT of ISA + 15, an altitude of aerodrome elevation plus 1,000 ft and the average visual manoeuvring speed for the aircraft category. Subject to an absolute minimum value of 2 km, the values were derived using the following formula:
 V = 0.9D
 Where V = circling visibility
 D = diameter of turn at the average manoeuvring speed for category
 0.9 = minimum downwind spacing, in nautical miles, to achieve alignment on final approach.
 The circling visibility recognises that the pilot of the aircraft must be able to see the runway from the downwind position.
Table 8-2A: Circling visibility values
Category                     A      B       C       D
IAS (kt)                     90.00  125.00  170.00  195.00
TAS (1 000 ft, ISA + 15)     93.70  130.14  176.99  203.01
r (km)                       0.51   0.98    1.81    2.38
E (km)                       0.21   0.29    0.39    0.45
D=2r +2E                     1.43   2.54    4.41    5.67
0.9D                         1.29   2.29    3.97    5.11
Minimum Circling Visibility  2.00   2.40    4.00    5.00

8.1.6.4 Where a procedure terminates outside the circling area, a visual segment may be provided. The visibility for a visual segment must be 5,000 m.

8.1.7                   State Minima

8.1.7.1              Visibility. The State visibility minima must be the value determined by paragraph 8.1.6, adjusted as follows:
(a)         for RVR values up to 400 m, the calculated values must be rounded-up to the nearest multiple of 25 m;
(aa) for RVR values greater than 400 m and up to 800 m, the calculated values must be rounded-up to the nearest multiple of 50 m;

(b)         for RVR values greater than 800 m and visibility values up to 1,000 m the calculated values must be rounded-up to the nearest multiple of 100 m;

(c)          for visibility values greater than 1,000 m, the calculated