单选题Approaching an anchorage in fog,you hear one short,one prolonged,and one short blast in that sequence on a ship’s whistle. This indicates().AA vessel towedBA vessel not under command and unable to maneuverCA vessel anchored giving warning of her positionDA vessel stopped dead in the water

单选题
Approaching an anchorage in fog,you hear one short,one prolonged,and one short blast in that sequence on a ship’s whistle. This indicates().
A

A vessel towed

B

A vessel not under command and unable to maneuver

C

A vessel anchored giving warning of her position

D

A vessel stopped dead in the water


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