navigation light
lights on a vessel, aircraft or spacecraft giving information on a craft's position, heading, and status
en-GB/ˌnævɪˈɡeɪʃn ˈlaɪt/
en-US/ˌnævəˈɡeɪʃən ˈlaɪt/
lights on a vessel, aircraft or spacecraft giving information on a craft's position, heading, and status