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單項(xiàng)選擇題

A METHOD OF TOWING VESSELS THROUGH POLAR ICE BY MEANS OF ICEBREAKING TUGS WITH A SPECIAL STERN NOTCH SUITED TO RECEIVE AND HOLD THE BOW OF THE VESSEL TO BE TOWED defines（）.

A.Towing operations
B.Rigid coupled towing
C.Close coupled towing
D.Hard coupled towing

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單項(xiàng)選擇題

A MARK OR POSITION AT WHICH A VESSEL IS REQUIRED TO REPORT TO ESTABLISH ITS POSITION defines（）.

A.VTS point
B.Way point
C.Reference point
D.Establishment point

單項(xiàng)選擇題

（）will the discharging operations take?

A.How long
B.How length
C.How many times
D.How many shift

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