Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p141
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 141/225)
Character Range: 677416–680023

of the X-shaped cross must:

(a) each be at least 6 m in length; and

(b) intersect at their midpoint (the intersection point):

 (i) at a preferred internal angle of 90 degrees; or

 (ii) so that a distinct X shape is discernible to the pilot of an aircraft:

             (A) in the air on approach to the runway; and
             (B) on the ground manoeuvring on the runway; and

(c) be deployed such that:

 (i) the cross is vertical and positioned at right angles to the runway centreline; and

 (ii) each arm of the cross is at 45 degrees to the horizontal; and

(d) have a light source coloured white, consisting of:

 (i) individual lamps or lights, facing the direction of the approach to the runway, and located as follows:

             (A) 1 — at the outer extremity of each lit arm;
             (B) others — evenly between the outer and inner extremities at intervals no greater than 1 m;
             (C) 1 — at the centre of the intersection point; or

 (ii) a light bar which completely illuminates the full length of each lit arm to a minimum width of 0.3 m; and

(e) in combination, provide a minimum day effective intensity, as illustrated in Figure 9.130 (1), of:

 (i) 70 000 cd at the beam centre; and

 (ii) 34 000 cd at 10 degrees radius from the beam centre; and

 (iii) 13 000 cd at 15 degrees radius from the beam centre; and

(f) in combination, provide a minimum night effective intensity, as illustrated in Figure 9.130 (1), of:

 (i) 2 000 cd at the beam centre; and

 (ii) 970 cd at 10 degrees radius from the beam centre; and

 (iii) 370 cd at 15 degrees radius from the beam centre.

       (3) For subsection (2), the light source must be from a portable or mains power supply that ensures:

(a) continuous operation of lighting for the lighted visual aid; and

(b) simultaneous illumination of all relevant lamps, lights or bars at between 15 and 30 cycles per minute with a one second maximum OFF-time.

       (4) The lighted visual aid must be designed and constructed to be capable of being:

(a) deployed within 15 minutes of being positioned on the runway; and

(b) removed from the runway within 15 minutes.

       (5) If the lighted visual aid is used in periods of low visibility, in addition to complying with subsection (3), it must also meet the secondary power supply requirements of section 9.05.

       (6) If the lighted visual aid is located on the runway during periods of daylight, the surface of the aid facing the pilot must be:

(a) coloured yellow; or

(b) obstacle marked in accordance with section 8.111; or

(c) otherwise illuminated.

9.130