A Navigation light is a coloured source of illumination on an aircraft, spacecraft, or waterborne vessel, used to signal a craft's position, heading, and status. Commonly, their placement is mandated by international conventions or civil authorities.
Navigation lighting systems include:
In addition to red, white and green running lights, a combination of red, white and green Mast Lights placed on a mast higher than all the running lights, and viewable from all directions, may be used to indicate the type of craft or the service it is performing. See "Quick Guide" in external links.
Aircraft navigation lights are placed in a way similar to that of marine vessels, with a red navigation light located on the left wingtip leading edge and a green light on the right wingtip leading edge. A white navigation light is as far aft as possible on the tail or each wing tip. High-intensity strobe lights are located on the aircraft to aid in collision avoidance.
Navigation lights in civil aviation are required to be operational and to be turned on from sunset to sunrise. High-intensity white strobe lights are part of the anti-collision light system, as well as the aviation red or white rotating beacon. The anti collision light system (either strobe lights or rotating beacon) is required to be operational and to be turned on for all airplanes built after March 11, 1996 on all aircraft operations.
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