RECOMMENDATIONS FOR WARNING OF AIR OBSTACLES

All obstacles as defined by the ICAO should be marked and/or illuminated.

• During the day, a warning light by illumination can replace a warning light by marking.
• At night, all obstacles must be illuminated with warning lights
• The type of warning light depends on the size (height, width and length) and shape of the object:
  • Low-intensity obstacle lighting for obstacles below 45 meters
  • Oświetlenie przeszkodowe średniej intensywności do przeszkód od 45 do 150 metrów
  • High-intensity obstacle lighting for obstacles over 150 meters

• The number and distribution of low-, medium- or high-intensity lights on each level to be marked should be such that the object is indicated from all angles in azimuth.
• If the light is shielded in any direction by another part of the object that affects the definition of the obstacle, additional lights must be provided, in such a way as to preserve the overall definition of the object to be illuminated.