Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p80
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 80/225)
Character Range: 521297–523890

"on" period, the lights of at least 1  IWDI will:

(a) start to flash, at between 40 to 50 flashes per minute; and

(b) continue to flash until the PAL:

           (i) switches off, and all other aerodrome lighting is extinguished; or

           (ii) has been reset for another "on" period.

       (10) If the PAL is reset for another "on" period, the lights of any flashing IWDI mentioned in subsection (9) must return from flashing to steady lighting.

CHAPTER 9

Division 6 Simple approach lighting

9.39 Simple approach lighting system

       (1) An aerodrome operator may provide a simple approach lighting system (SALS) to serve a non-precision approach, or non-instrument, runway.

Note 1   Depending on the runway's length, a SALS can provide an operational benefit by reducing the minimum visibility or RVR requirements for an instrument approach conducted to the runway.
Note 2   A SALS can enhance visual guidance for a non-instrument runway.

       (2) A SALS must:

(a) consist of a row of lights on the extended centreline of a runway, as illustrated in Figure 9.39 (2), within a tolerance of ± 15'; and

(b) subject to subsection 9.40 (3), as far as possible have a length of at least 420 m.

Notes
1. As the length of a SALS increases from 210 m to 719 m, there can be a corresponding reduction in the minimum visibility or RVR requirements for an instrument approach conducted to that runway.
2. While a SALS shorter than 210 m may enhance visual guidance, it provides no benefit in operating minima over a runway that is not equipped with an approach lighting system.
3. There is no additional operational benefit achievable with a SALS equal to or longer than 720 m.
4. CASA recommends that aerodrome operators should consult an instrument flight procedure designer for specific information about the impact of approach lighting on operating minima.

       (3) If the length of the SALS is 300 m or more, a row of lights forming a crossbar must be provided at a Point B as shown in Figure 9.39 (2).

       (4) For subsection (3), the crossbar must be:
(a) 18 m in length for runways less than 30 m wide; and

(b) 30 m in length for runways with a width of 30 m or more.

       (5) An additional crossbar may be provided at a Point A as shown in Figure 9.39 (2) if:

(a) the SALS uses a centreline with single light sources; and

(b) there is a crossbar at Point B.

       (6) The lights forming a crossbar in a SALS must be:

(a) as nearly as possible in a horizontal straight line at right angles to, and bisected by, the line of the centreline lights; and

(b)