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
The height of a VHF radio antenna is more important than the power output wattage of the radio because（）.
Some goods are missing（）terrible weather.
What does the abbreviation VHF stand for?（）
Channel 13 (156.65 MHz)，the designated bridge-to-bridge channel，may NOT be used to（）.
（）both anchors.
Please（）all the lines fore and aft，the vessel is just in her position of the berth now.
Pilot Station，this is Chinese ship Jinsha（）.Over.
A call between any two ship stations on an intership working frequency shall have a maximum duration of（）.
My ship（）that port next month.
One hour before arrival at Elbe 1 light vessel，masters are advised to contact the pilot boat by（）.