Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p37
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 37/225)
Character Range: 410827–413546

threshold of an instrument runway.

       (5) Despite subsections (2) and (4), for a runway that is not more than 1 200 m in length, the wind direction indicator may be centrally located provided it is visible from:

(a) both approaches; and

(b) the aircraft parking area.

       (6) The location required by subsection (4) does not apply to an instrument runway if surface wind information is communicated to pilots of aircraft approaching the runway by:

(a) ATC; or

(b) an aerodrome weather observing system that:

 (i) is a Bureau of Meteorology-approved weather observing system; and

           (ii) provides surface wind information through an aerodrome weather information broadcast; or

(c) an approved observer with a communication link to pilots through which timely information about surface wind may be passed; or

(d) any other means approved in writing by CASA.

Note   Despite subsection (6), locating a wind direction indicator at the threshold is recommended as such a visual aid provides immediate indication of wind direction and speed to pilots at the critical phase of the landing.

       (7) A wind direction indicator provided at the threshold of an instrument runway must be located as follows:

(a) on the left-hand side of the threshold as seen from a landing aircraft;

(b) outside the runway strip;

(c) clear of the transitional obstacle limitation surface;

(d) 100 m upwind of the threshold.

       (8) Despite paragraphs (7) (a) and (d), a wind direction indicator may be located on the right‑hand side of the threshold, and up to 200 m upwind, if the left-hand side location 100 m upwind of the threshold is obstructed by:

(a) a taxiway, a navigational aid or a similar obstruction; or

(b) a structure or obstacle which is assessed, by CASA or a person approved in writing by CASA, as interfering with natural wind effects.

       (9) Despite subsections (7) and (8), a wind direction indicator provided at the threshold of an instrument runway may be located as approved in writing by CASA.

8.102 Standards for wind direction indicators

       (1) A wind direction indicator must consist of a tapering fabric sleeve with the widest end attached to a pole at an attachment point which ensures that the centroid of the sleeve is as close as possible to being 6.5 m above the ground.

       (2) The sleeve must be 3.65 m long and taper uniformly from 900 mm in diameter to 250 mm in diameter, as illustrated in Figure 8.102 (2).

       (3) The widest end of the sleeve must be mounted on a rigid frame that:

(a) keeps the end of the sleeve open; and

(b) keeps the sleeve attached to the pole; and

(c) allows the sleeve to move freely through 360 degrees around the pole.