OBSTRUCTION LIGHTING FOR STACK
These recommendations are based on Chapter 6 of Annex 14 of ICAO (International Civil Aviation Organization latest edition)
The number of lights per level depends on diameter of the stack: As per FAA and ICAO aerodrome design manual, 3 lights may be required per level if the diameter is less than 6 meters, 4 lights if the diameter is between 6 and 30 meters, 6 lights if the diameter is between 30 and 60 meters and 8 lights if it is above 60 meters
Day and night operation (stack without red and white stripes)
45 to 105 meters high
Dual color medium intensity up to 6 meters below the top of the stack (red flashing at night, white flashing during daytime) Low intensity type B or FAA L-810(F) at mid level (red at night, off the day) Power cabinet and photocell
Position | Description | Model | |
---|---|---|---|
1 | Dual color medium intensity OBSTAFLASH120 | OFP-120-RW-JB | |
2 | Low intensity type B | NAVILITE-IR-FAA-120-240V | |
3 | Stainless power supply | OFP-CAB-1B-RW-240 | |
4 | Photocell | PHOTOCELL DC |
Night only operation (stack with red and white stripes)
up to 45 meters high
3 or more low intensity type B or FAA L-810 close to the top
45 to 105 meters high
3 or more red medium intensity up close to the top of the stack 3 or more low intensity type B or FAA L-810(F) at mid level
In case of medium intensity, control cabinet and photocell oriented to the North should be present at bottom
Position | Description | Model |
---|---|---|
1 | Medium intensity type B | |
2 | Low intensity type B | |
3 | Controller | |
4 | Photocell (night only operation) |
Stack more than 150 meters high
3 or more high intensity type A obstruction lights every 105 meters maximum