Gravity Davit Rolling Type Details Gravity davit could launch the boat to the surface of water by boat own gravity, which could pour down the boat outboard even if it loss 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. meanwhile, the crews can operate it on the deck. This device meets the requirement of SOLAS 1974, the international life saving equipment rules LSA and IMO, MSC81 (70) and other regulatory.