单项选择题

In ballasting to survival draft，while in transit，due to extreme wind and wave loads，thrusters or propulsion，if available，should be used to（）.

A.reduce windward mooring tensions
B.maintain vessel heading
C.maximize accelerations
D.increase speed of advance

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In a following sea，a wave has overtaken your vessel and thrown the stern to starboard. To continue along your original course，you should（）.

A.use more right rudder
B.use more left rudder
C.increase speed
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If you are the stand-on vessel in a crossing situation，you may take action to avoid collision by your maneuver alone. When may this action be taken?（）.

A.At any time you feel it is appropriate
B.Only when you have reached extremis
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If the towline parts，you should（）.

A.start towing by pushing ahead
B.abandon the towing vessel
C.retrieve the tow bridle
D.relieve strain on the retrieving line