单项选择题

Which fitting is used to connect the boom to the mast? （）

A.Clevis pin
B.Gunter-lug
C.Gooseneck
D.Transom

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单项选择题

Which device is designed to automatically hold the load if power should fail to an electric winch?（）

A.Pneumatic brake
B.Electromagnetic brake
C.Hand brake
D.Motor controller

单项选择题

When the pilot is embarked he or she（）.

A.relieves the officer of the watch
B.relieves the Master of his duties
C.is solely responsible for the safe navigation of the vessel
D.is a specialist hired for his or her local navigational knowledge