CS HPT-DSN.F.630 Approach lighting system

(a)Applicability: Where provided at a heliport, an approach lighting system should indicate a preferred approach direction.

(b)Location: The approach lighting system should be located in a straight line along the preferred direction of approach.

(c)Characteristics:

(1)An approach lighting system should consist of a row of three lights spaced uniformly at 30 m intervals and of a crossbar 18 m in length at a distance of 90 m from the perimeter of the FATO as shown in Figure F-7. The lights forming the crossbar should be as nearly as practicable in a horizontal straight line at right angles to, and bisected by, the line of the centre line lights, and spaced at 4.5 m intervals.

(2)Where there is a need to make the final approach course more conspicuous, additional lights spaced uniformly at 30 m intervals should be added beyond the crossbar. The lights beyond the crossbar may be steady or sequenced flashing, depending upon the environment.

(3)The steady lights should be omnidirectional white lights.

(4)Sequenced flashing lights should be omnidirectional white lights.

(5)The flashing lights should have a flash frequency of one per second and their light distribution should be as shown in Figure F-9, Illustration 2. The flash sequence should commence from the outermost light and progress towards the crossbar.

(6)A suitable brilliancy control should be incorporated to allow for adjustment of light intensity to meet the prevailing conditions.

[Figure or form omitted from this preview — available in the Avioverse workspace library.] Figure F-7. Approach lighting system