单项选择题
Moving of an anchor over the sea bottom involuntarily because it is no longer preventing the movement of the vessel defines（）.
A.dredging ( of anchor )
B.dragging ( of anchor )
C.weighing anchor
D.walking out anchor
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相关考题
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单项选择题
Moving of an anchor over the sea bottom to control the movement of the vessel defines（）.
A.dredging ( of anchor )
B.dragging ( of anchor )
C.weighing anchor
D.walking out anchor -
单项选择题
Pan-Pan is to be used to announce（）.
A.a distress message
B.an urgency message
C.a safety message
D.a message of SMCP -
单项选择题
Pan-Pan repeated three times over the radiotelephone indicates which type of message will follow?（）
A.distress
B.safety
C.all clear
D.urgency
