A flashing green light displayed at a single lock means that the lock is（）.

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

A.Rudder action will become more effective
B.The vessel's list will change
C.The vessel's trim will change
D.An increase in speed will occur

A.decrease in capabilities of radar
B.decrease in displacement
C.adverse effect on trim
D.loss of stability