單項(xiàng)選擇題

The best method to stop a vessel from dragging anchor in a sand bottom is to（）.

A.reduce the length of the cable
B.pay out more anchor cable
C.back the engines
D.swing the rudder several times to work the anchor into the bottom

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單項(xiàng)選擇題

PAN-PAN repeated three times over the radiotelephone indicates which type of message will follow?（）

A.Distress
B.Safety
C.All clear
D.Urgency

單項(xiàng)選擇題

In radiotelephone communications，the prefix PAN-PAN indicates that（）.

A.a ship is threatened by grave and imminent danger and requests immediate assistance
B.a calling station has an urgent message about the safety of a person
C.the message following the prefix will be about the safety of navigation
D.the message following is a meteorological warning

The best method to stop a vessel from dragging anchor in a sand bottom is to（）.

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PAN-PAN repeated three times over the radiotelephone indicates which type of message will follow?（）

In radiotelephone communications，the prefix PAN-PAN indicates that（）.

In radiotelephone communications，the prefix PAN-PAN indicates that（）.