Never（）the lifeboat or lifecraft disengaging locks or hydrostatic release gears because it can cause them to fail to function.

单项选择题（）is used for heaving up and slacking away the anchor and chain.

A.A winch
B.A windlass
C.A deck crane
D.A lifeboat engine

单项选择题Frapping lines are fitted to lifeboat davits to（）.

A.secure the lifeboat in the davits when in the stowed position
B.bring the lifeboat close along the rail in the embarkation position
C.give the occupants a safety line when the boat is being lowered from the embarkation level
D.reduce the swinging of the lifeboat at the embarkation level

单项选择题If you hear more than six short blasts and one long blast of the whistle supplemented by the same signal on the general alarm，you should（）.

A.start the fire pump
B.go to your man overboard station
C.go to your lifeboat station
D.stand by for collision

单项选择题When launching a lifeboat in the rough sea，the davit gears should be released（）.

A.before the boat is lowered from the stowed position
B.as the boat fall blocks break clear of the davit head
C.before the boat is lowered from the embarkation level
D.after the boat is released into the water

单项选择题Your vessel has lifeboats on both sides. Lifeboat No. 2 is located（）.

A.forward of lifeboat No. 4 on the starboard side
B.forward of lifeboat No. 4 on the port side
C.aft of lifeboat No. 1 on the starboard side
D.All of the above