Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p89
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 89/225)
Character Range: 543519–546264

light intensities of the following:

(a) the ellipse defining the main beam of a typical, newly installed approach light;

(b) the main beam of a typical newly installed runway edge light:

        must be as follows:

(c) for approach centreline and crossbar lights for a precision approach lighting system ― 1.5 to 2.0 (white light), as shown in Figure 9.43 (1)-1;

(d) for approach side row lights for a precision approach lighting system ― 0.5 to 1.0 (red light) as illustrated in Figure 9.43 (1)‑2.

       (2) The average light intensity of the ellipse defining the main beam of a simple approach lighting system (SALS) not associated with a precision approach runway must be at least the same as the corresponding runway edge light.

a  10   14   15
b  5.5  6.5  8.5

 Curves calculated on formula:

     Figure 9.43 (1)-1   Isocandela diagram for approach centreline and crossbar lights (white light) (shows matters)

       (3) Vertical setting angles of the approach centreline and crossbar lights must be such that for a distance from the threshold mentioned in a row of column 1 of Table 9.43 (3) the vertical main beam coverage must be the value mentioned in the same row in column 2.

     Table 9.43 (3)   Vertical setting angles — approach centreline and crossbar lights

Distance from threshold  Vertical main beam coverage
Threshold to 315 m       0º – 11º
316 m to 475 m           0.5º – 11.5º
476 m to 640 m           1.5º – 12.5º
641 m and beyond         2.5º – 13.5º (as illustrated above in Figure 9.43 (1)-1)

       (4) Subject to subsections (5) and (7), all lights must be aligned parallel to the centreline of the runway.

       (5) Lights in crossbars beyond 22.5 m from the centreline must be toed-in 2 degrees.

a  7.0  11.5  16.5
b  5.0  6.0   8.0

        Curves calculated on formula:

     Figure 9.43 (1)-2   Isocandela diagram for approach side row light (red light)

       (6) Vertical setting angles of the approach side row lights must be such that for a distance from the threshold mentioned in a row of column 1 of Table 9.43 (6), the vertical main beam coverage is the value mentioned in the same row in column 2.

     Table 9.43 (6)   Vertical setting angles — approach side row lights
Distance from threshold  Vertical main beam coverage
Threshold to 115 m       0.5º – 10.5º
116 m to 215 m           1.0º – 11º
216 m and beyond         1.5º – 11.5º (as illustrated above in Figure 9.43 (1)-2)

       (7) Approach side row lights must be toed-in 2 degrees.

CHAPTER 9

Division 9 Visual approach slope indicator systems

9.44 Visual approach slope indicator systems (VASISs)

       (1) This Division applies to the following types of VASIS:

(a) a T visual approach slope indicator system