Origin: Germanic Old English suffix
Navigation light has 2 different meanings across 1 category:
light on an airplane that indicates the plane's position and orientation; red light on the left (port) wing tip and green light on the right (starboard) wing tip
one of two or more lights fitted to a ship or aircraft, which indicate position and direction taken, especially important at night. Internationally recognised colours are red on the port side, and green on the starboard side.