船用救生抛绳器、烟火信号是当船舶遇险时与救助船或岸上进行联系的设备;船用气涨式救生筏自动脱钩器是当船遇险下沉到1.8米以下时,在水压力作用下自动脱钩,使筏自动膨胀开浮在水面,使水面上人员得以脱险的设备。这些是保证广大海员(或旅客)安全的必须配备的船用救生设备。 Marine rescue throwing device, fire signal is the ship in distress with the rescue vessel or onshore contact equipment; marine gas rising liferaft automatic decoupling device is the ship in danger of sinking to 1.8 meters below the water pressure under the automatic Decoupling, so that the raft automatically expands open floating in the water, so that the water surface to escape the equipment. These are marine life-saving equipment that must be equipped to ensure the safety of seafarers (or travelers).