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
D.when nearing a bend in the channel，sound a long blast of the whistle
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A.The vessel moving upstream against the current
B.The vessel moving downstream with a following current
C.The vessel located more towards the channel centerline
D.The vessel with the least amount of maneuverability
A.indicated horsepower
B.brake horsepower
C.dynamic horsepower
D.net horsepower
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A vessel proceeding along a narrow channel shall（）.
A vessel which is being assisted by an icebreaker should indicate that she is ready to cast off the towline by（）.
A vessel the passage of which is not to be impeded（）to comply with this Rule when the two vessels are approaching one another so as to involve risk of collision.
A vessel proceeding along the course of a narrow channel shall keep as near to the outer limitof the channel which lies on her starboard side as it is safe and practicable.Which one of the followings does the statement express?（）.
A towing vessel should be on the crest of a wave at the same time as its tow and in the trough at the same time. The term used to describe this is（）.