This LED portable navigation light is fixed on the bow of the ship with a suction cup, which is very suitable for night travel that requires long-term use. It can be easily installed on ships under 7 meters (22 feet) at speeds below 7 knots (8 mph). The energy consumption of LED lamps is 1/8 of that of incandescent lamps, which can extend battery life ten times. The one-piece housing is completely waterproof and has dual optical lenses, O-ring lens housing, shock-resistant neoprene accents, ultrasonic sealed lenses, heavy-duty rubber start/stop switches, and fully buoyant. It can be operated with 4 AA batteries (not included).