IS 7785 : Part 4 : Sec 1 : 1981 Elevated type aerodrome lighting fittings: Part 4 Angle of approach lights, Section 1 Visual approach slope indicators

1. Scope

1.1 This standard (Part IV/Sec 1) specifies the photometric performance and the essential mechanical and electirical features ( other than lamps) of a visual approach slope indicator.