This ac does not constitute a regulation and in general is not mandatory.
Faa aircraft warning lights requirements.
Desire to voluntarily mark and or light their structure should request the proper marking and or lighting from the faa to ensure no aviation safety issues are impacted.
If a rod antenna or other appurtenance exceeds 40 feet 12 m above the tip of the main structure a medium intensity flashing white light should be placed within 40 feet 12 m from the top of the.
In addition the federal communications commission governs monitoring requirements for airport obstruction lights.
The faa recommends the guidelines and standards in this ac for determining the proper way to light and mark obstructions affecting navigable airspace.
There are many factors that can affect obstruction marking requirements such as weather terrain proximity to airports etc.
70 7460 1l obstruction marking and lighting with change 2 date issued october 08 2016 responsible office ajv 1 airspace service description this advisory circular ac sets forth standards for marking and lighting obstructions that have been deemed to be a hazard to air navigation.
On structures 200 feet agl or more medium intensity white flashing lights may be used in daylight and twilight hours but the intensity must be reduced at night.
Introduction to obstruction lighting guidelines any structure that exceeds 200 above ground level generally needs to be marked lighted according to faa icao regulations.
Note that for red lighting systems the tower must be painted in alternating levels of aviation orange and white to provide maximum daytime visibility red lights are for nighttime only.
Faa lighting requirements according to federal aviation administration faa all structures exceeding 200 feet above ground level agl must be appropriately marked with tower lights or tower paint.
Marking or lighting an object in accordance with the standards for an object of greater height or size.
Requirements during the night aviation red flashing beacons and or steady burning beacons must be used on required structures.
Light sport aircraft accepted standards faa notice of availability noa information the previously accepted consensus standard has been revised and this noa is accepting the later revision.
The object may present such an extraordinary hazard potential that higher.
Updated all figures in appendix a pages a 1 to a 30.