As a vessel sinks to a depth of 15 feet，the hydrostatic trip releases the liferaft container from its cradle by（）.

单项选择题A capsized small sail vessel is best righted when what part of the vessel is downwind?（）

A.Stern
B.Bow
C.Centerboard
D.Mast

单项选择题A cable used by helicopters for lifting or lowering persons in a pick-up operation is a（）.

A.Hoist
B.Rope
C.Cable
D.Line

单项选择题A breeches buoy is being rigged from the shore to a stranded vessel. The initial shot line passed to the vessel is normally made fast to a（）.

A.hawser which is used to pass a tail-block and whip to the vessel
B.hawser with breeches buoy and harness attached
C.hawser which should be made fast to the vessel below the intended location of the tail-block
D.tail-block and whip which may be used to pass a hawser to the vessel

单项选择题An inflatable liferaft can be launched by（）.

A.the float-free method ONLY
B.breaking the weak link on the painter
C.throwing the entire container overboard and then pulling on the operating cord to inflate the raft
D.removing the securing straps

单项选择题An inflatable liferaft is hand-launched by（）.

A.pulling a cord
B.cutting the wire restraining bands
C.removing the rubber packing strip
D.throwing the entire container overboard