Aviation Obstruction Marking and Lighting

This Standard defines the minimum mandatory requirements governing the design and installation for the marking and lighting of communications towers and other obstructions that may pose a hazard to aviation. If any object or portion thereof, either temporary or permanent, exceeds an overall height of 60 m above ground level (AGL), if the object meets the criteria for determining obstructions set forth under 14 CFR part 77 of the United States Federal Aviation Administration (FAA) Regulations regardless
of height, or if the Manager of the Aviation or Loss Prevention Departments or their representative deems a structure as an obstruction, that object shall be marked and lighted according to the requirements in this standard. The overall height includes all appurtenances such as lights, rods, or antennas.