Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p38
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 38/225)
Character Range: 413335–416019

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.

       (4) The fabric of the sleeve must be of a conspicuous colour, preferably white, except that white fabric must not be used if its visibility is affected by snow or other contaminant on the movement area.

Note   Natural or synthetic fibres within the weight range of 270 to 275 g/m2 have been used effectively as wind direction indicator sleeve material.

     Figure 8.102 (2)   Wind direction indicator (illustrates matters)

       (5) At a non-controlled aerodrome, or an aerodrome without a 24 hour ATC service, the pole of at least 1 wind direction indicator must be located in the centre of a circle (the background circle) on the ground which provides a background contrast for the colour of the sleeve.

       (6) The background circle must be:

(a) 15 m in diameter; and

(b) coloured black; and

(c) bordered by:

 (i) a white perimeter 1.2 m wide; or

 (ii) a ring of at least 8 equally-spaced white markers, each with a base not less than 0.75 m in diameter.

Note   For the illumination of wind direction indicators, see section 9.38.

       (7) At aerodromes with more than one wind direction indicator, any additional wind direction indicators mentioned in paragraph 8.101 (1) (b) must comply with subsections (1), (2), (3) and (4) (of this section) except that the sleeve colour may be:

(a) if not illuminated at night — a conspicuous colour other than white, preferably yellow or orange; and

(b) if illuminated at night — white (subject to subsection (4)), or another contrasting colour which is clearly visible when illuminated.

CHAPTER 8

Division 8 Ground signals

8.103 Signal areas

       (1) A signal area may be provided in conjunction with 1 wind direction indicator.

Note   Provision of a signal area is optional. It is neither compulsory nor necessary because of the requirements for radio carriage and use at certified aerodromes under regulation 166E of CAR, and the requirement for NOTAMs to be issued for the aerodrome in the event of changes to conditions. A signal area would be unnecessary if a 24-hour ATC service is provided at the aerodrome.

       (2) A signal area must be:

(a) 9 m in diameter; and

(b) black in colour; and

(c) bordered by:

           (i) a white border 1 metre wide; or

           (ii) a minimum of 5 equally-spaced white markers, each with a base not less than 0.75 m in diameter; and

Note   See the illustration in Figure 8.103 (2).

(d) not more than 15 m from:

 (i) the wind direction