A.is ready to use but vessels must stand clear
B.is ready to use and vessels may approach
C.cannot be made ready immediately and vessels shall stand clear
D.cannot be made ready immediately but vessels may approach
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A.ready for entrance
B.ready for entrance，but gates cannot be closed completely
C.being made ready for entrance
D.not ready for entrance
A.enter the pack on the windward side where there is a well defined ice edge
B.trim to an even keel or slightly down by the bow to take maximum benefit of the ice reinforcement
C.take maximum advantage of coastal leads caused by offshore winds
D.look for areas of rotten ice and enter perpendicular to the ice edge
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A vessel which is being assisted by an icebreaker should indicate that she is ready to cast off the towline by（）.
In selecting a tug for moving a vessel，consideration should be given to its（）.
On a single-screw vessel the stern frame（）.
As the weather was worsening and wind force rising to 8，my vessel（）were yawing within forty degrees of the compass.
A vessel shall slacken her speed，stop，or reverse her engines，if necessary，to（）.