单项选择题

A vessel shall not（）.

A.enter the traffic separation zone in an emergency
B.cross a traffic lane
C.engage in fishing in the separation zone
D.proceed in an inappropriate traffic lane

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A sailing vessel shall not impede the safe passage of a（）．

A.power-driven vessel following a traffic lane
B.pilot vessel enroute to a pilot station
C.law enforcement vessel
D.All of the above

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（）is not a type of IALA maritime buoyage system.

A.special marks
B.isolated danger marks
C.cardinal marks
D.fore and aft marks

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When using the anchor to steady the bow while approaching a dock you must be aware of the fact that（）.

A.the vessel will tend to take a large sheer towards the side where the anchor is down
B.steering control is ineffective in trying to turn to the side opposite to that of the anchor being used
C.the anchor cable must never lead under the hull
D.using an offshore anchor decreases the chances of the anchor holding