单项选择题

On a ship’s crane，the load chart relates the allowable load to the combination of the boom length and（）.

A.winch speed
B.boom strength
C.load radius
D.cable strength

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单项选择题
Oil may NOT be transferred unless（）.

A.there are two certificated tankermen on each vessel
B.the vessel is equipped with constant-tension winches
C.discharge containment equipment (i.e. drip pans) are in place
D.All of the above
单项选择题
Off hire is when a vessel breaks down，strands，or has any damage that prevents the working of cargo or delays the sailing of the vessel．Under which of the following charter parties is off hire most likely to be mentioned?（）.

A.Bareboat
B.Voyage
C.Time
D.Lease
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