The sprinkler system of an enclosed lifeboat is used to（）.

A.forward and outboard of all obstructions
B.forward and inboard of all obstructions
C.up and down from the main deck
D.to the foremost point on the vessel

A.check the liferaft's way
B.keep the liferaft end on to the sea
C.reduce the possibility of capsizing or broaching
D.right the raft if it inflates inverted

A.mean sea level
B.mean high water
C.mean low water
D.half-tide level