单项选择题

THE SPEED OF A VESSEL ADJUSTED TO THAT OF A PILOT BOAT AT WHICH THE PILOT CAN SAFELY EMBARK is （）.

A.Ground speed
B.Boarding speed
C.Relative speed
D.Speed of the vessel

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单项选择题
The single letter G，sent by an icebreaker to an assisted vessel，means （）.

A.I require a pilot
B.Longitude follows
C.I am going ahead; follow me
D.Do not follow me
单项选择题
The radiotelephone required by the Vessel Bridge-to-Bridge Radiotelephone Act is for the exclusive use of （）.

A.the Master or person in charge of the vessel
B.a person designated by the Master
C.a person on board to pilot the vessel
D.All of the above
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