Apparatus for energy saving in a vessel

When loading large trucks and trailer vehicles in car carriers and car rivers with liftable car decks and hoistable car decks, move the lower deck to the upper deck and use only one deck An energy saving device for a ship is disclosed in which lighting of the upper deck is turned off to reduce energy waste due to unnecessary use of illumination. The disclosed energy saving device includes a circuit breaker for supplying a power source for a lighting point to a car deck for loading a vehicle; A proximity switch for generating a switching control signal by using a force of an electromagnetic field depending on the presence or absence of an object approaching the detection surface; A magnetic connector for controlling lighting of the card deck by switching a power source supplied to the illumination of the card deck in the circuit breaker according to a switching control signal generated by the proximity switch; And a junction switch for connecting a switching control signal generated in the proximity switch to the magnetic connector.