单项选择题

VHF Channel 6 is used exclusively for what kind of communications?（）

A.Radio checks and time checks
B.Inter-vessel safety and search and rescue
C.Working with helicopters
D.Radio direction finding

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单项选择题

A.stopping
B.to stop
C.to be stopped
D.to be stopping

单项选择题

A.propulsion horsepower available
B.pulling ability at cruise power
C.towing winch capability
D.pulling ability under static conditions

单项选择题

A.It will have no effect
B.It will increase the holding power
C.It will reduce the holding power
D.It will cause the anchor to snag