A.VHF communications are basically line of sight
B.the air is more dense the higher you go
C.salt water is a poor conductor of sound
D.sea water absorbs the radiated energy
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A.Mayday，Mayday，Mayday
B.Pan，Pan，Pan
C.Security，Security，Security
D.Lights out，Lights out，Lights out
A.to get the engine ready
B.to respond to the engine
C.to maneuver the engine
D.to change the engine
A.due
B.because of
C.because
D.since
A.persist
B.persists
C.to persist
D.persisted
A.pay out
B.make fast
C.shorten
D.hold on
最新試題
Channel 13 (156.65 MHz)，the designated bridge-to-bridge channel，may NOT be used to（）.
All VHF marine band radios operate in the simplex mode，which means that（）.
The height of a VHF radio antenna is more important than the power output wattage of the radio because（）.
（），you can’t finish discharging tomorrow!
Vessels wishing to communicate with the Port Health Officer should do（）on VHF Channel 14.
（）both anchors.
The weather is often（）in a high-pressure area.
The present voyage of my ship began at the port of Shanghai after loading 8 000 tons of Cargo on board and ended after discharging the Cargo at the port of Hong Kong，which was（）.
How should the letter O be pronounced when spoken on the radiotelephone?（）
Should that kind of weather（），the two ships would touch each other.