单项选择题

She（the vessel）shall if necessary（）and in any event navigate with extreme caution until danger of collision is over.

A.take all her way off
B.take her way all off
C.take her way off
D.take off her all way

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单项选择题

SAFE SPEED is defined as that speed where（）.

A.you can stop within your visibility range
B.you can take proper and effective action to avoid collision
C.you are traveling slower than surrounding vessels
D.no wake comes from your vessel

单项选择题

In order for a stand-on vessel to take action in a situation，she must determine that the other vessel（）.

A.Is restricted in her ability to maneuver
B.Has sounded the danger signal
C.Is not taking appropriate action
D.Has not changed course since risk of collision was determined