单项选择题
A storm is forecast for the area where your vessel is moored. For its safety you should put （）.
A.more slack in the mooring lines
B.a strain on the mooring lines
C.chafing gear on the mooring lines
D.grease on the mooring lines
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A.calms
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C.strong winds
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A stand-on vessel in a crossing situation is allowed to take action when （）.
A.on a collision course
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A marker pole，with a horseshoe buoy and a sea anchor attached，should be used to （）.
A.mark the position of a lost mooring
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C.determine your speed through the water
D.indicate location of a man overboard
