Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p86
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 86/225)
Character Range: 536137–538776

extended centreline of the runway extending at least to Point B, with:

(a) 2 side rows of lights, extending between the threshold and Point B; and

(b) 2 crossbars, 1 at 150 m and 1 at 300 m from the threshold, at Points A and B.

       (4) A precision approach CAT II or CAT III lighting system that has a total length of less than 420 m may be provided to support instrument approach operations type B (CAT II) only if a safety and operational assessment has established that the selected length of approach lighting is suitable for the operations.

Note 1   The design objective for a precision approach CAT II or CAT III lighting system that utilises a distance-coded centreline should be a system length of 900 m. This length enables full design layout of this form of approach lighting system and enables, in addition to CAT II or III operations, lowest visibility or RVR minima for other instrument approach operations.

Note 2   The design objective for a precision approach CAT II or CAT III lighting system that utilises a barrette centreline should be a system length of between 720 m and 900 m. This length enables, in addition to CAT II or CAT III operations, lowest visibility or RVR minima for other instrument approach operations.

Note 3   A precision approach CAT II or CAT III lighting system that has a length of less than 720 m will require compensating increases in the visibility or RVR minima for other instrument approach operations conducted to that runway.

       (5) As shown in Figure 9.42 (3), the centreline lights must be:

(a) at equal longitudinal intervals between the crossbars, or between a crossbar and the threshold, as close as possible to 30 m and not exceeding ± 2 m; or

(b) if crossbars are placed with the application of the allowable plus or minus tolerances shown in Figure 9.42 (3) — such that they are at equidistant intervals between the runway threshold and the first crossbar and between any other crossbars.

Note   Due to the location of existing fences, access roads and navigational arrays, it might not be possible to space the centreline lights at 30 m in a section of the approach lighting array. Consistent spacings, as close as possible to 30 m, will ensure the correct perception of the visual aid by flight crew.  Aerodrome operators are recommended to consult with their aircraft operators when designing approach lighting arrays.

        Side row lights

       (6) The side row lights must be placed:

(a) on each side of the centreline; and

(b) at a longitudinal spacing equal to that of the centreline lights; and

(c) aligned with the centreline lights; and

(d) so