单项选择题
Which measure should NOT be taken to reduce the pounding of a vessel in a head sea?（）
A.Add ballast in the afterpeak
B.Add ballast forward
C.Alter course
D.Reduce speed
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Where would you find the call sign or call letters of the radio station on your ship?（）
A.In the rig safety manual
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To safely anchor a vessel there must be sufficient scope in the anchor cable. Scope is the ratio of（）.
A.weight of cable to weight of vessel
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