GM1 ADR-DSN.Q.846 Lighting of fixed objects

(a)Guidance on how a combination of low-, medium-, and/or high-intensity lights on obstacles should be displayed is given in Figures GM-Q-1 to GM-Q-8.

(b)High-intensity obstacle lights are intended for day use as well as night use. Care should be taken to ensure that these lights do not create disconcerting dazzle or environmental concerns. Guidance on the design, location, and operation of high-intensity obstacle lights is given in ICAO Doc 9157, Aerodrome Design Manual, Part 4, Visual Aids.

(c)Where, the use of high-intensity obstacle lights, Type A, or medium-intensity obstacle lights, Type A, at night may dazzle pilots in the vicinity of an aerodrome (within approximately 10 000 m radius) or cause significant environmental concerns, a dual obstacle lighting system should be provided. This system should be composed of high-intensity obstacle lights, Type A, or medium intensity obstacle lights, Type A, as appropriate, for daytime and twilight use and medium-intensity obstacle light, Type B or C, for night-time use. [Figure or form omitted from this preview — available in the Avioverse workspace library.] Figure GM-Q-1.Medium-intensity flashing-white obstacle lighting system, Type A [Figure or form omitted from this preview — available in the Avioverse workspace library.] Figure GM-Q-2. Medium-intensity flashing-red obstacle lighting system, Type B [Figure or form omitted from this preview — available in the Avioverse workspace library.] Figure GM-Q-3. Medium-intensity fixed-red obstacle lighting system, Type C [Figure or form omitted from this preview — available in the Avioverse workspace library.] Figure GM-Q-4. Medium-intensity dual obstacle lighting system, Type A/Type B [Figure or form omitted from this preview — available in the Avioverse workspace library.] Figure GM-Q-5. Medium-intensity dual obstacle lighting system, Type A/Type C [Figure or form omitted from this preview — available in the Avioverse workspace library.] Figure GM-Q-6. High-intensity flashing-white obstacle lighting system, Type A [Figure or form omitted from this preview — available in the Avioverse workspace library.] Figure GM-Q-7. High-/medium-intensity dual obstacle lighting system, Type A/Type B [Figure or form omitted from this preview — available in the Avioverse workspace library.] Figure GM-Q-8. High-/medium-intensity dual obstacle lighting system, Type A/Type C In the cases as stated in CS ADR-DSN.Q.848(c) and (d), normally the spacing would not exceed 52 m.

[Issue: ADR-DSN/3]