单项选择题

A vessel proceeding along the bank of a river or channel has the tendency to（）.

A.continue in line with the bank
B.hug the bank
C.sheer away from the bank
D.increase speed

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A vessel proceeding along a narrow channel shall（）.

A.avoid crossing the channel at right angles
B.not overtake any vessels within the channel
C.keep as near as safe and practicable to the limit of the channel on her starboard side
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A vessel is proceeding downstream in a narrow channel on the Western Rivers when another vessel is sighted moving upstream. Which vessel has the right of way? （）

A.The vessel moving upstream against the current
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A tug’s horsepower available at the shaft is（）.

A.indicated horsepower
B.brake horsepower
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D.net horsepower