This device could launch the boat by its own gravity to the surface of water, also, which could pour down the boat outboard while it is loss of electric power; while launching, the passengers could pull the remote-control cable in the boat to launch or stop the life/rescue boat or raft. As well, the crews can operate it on the deck. This device meets the SOLAS 1974 the international life-Saving appliance rules LSA and IMO, MSC81(70) and other regulatory requirements.