A.calls
B.called
C.calling
D.call
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A.telephone
B.telegraph
C.telex
D.VHF
A.calls at
B.has called at
C.call at
D.will call at
A.Calling frequency
B.Distress frequency
C.Urgency frequency
D.Working frequency
A.to be
B.is
C.will be
D.has been
A.at
B.by
C.in
D.on
最新試題
One hour before arrival at Elbe 1 light vessel，masters are advised to contact the pilot boat by（）.
（）your present speed?
I am ready（）tow line.
The expression STAND-BY ENGINE means:（）.
Please（）all the lines fore and aft，the vessel is just in her position of the berth now.
How should the letter O be pronounced when spoken on the radiotelephone?（）
There is a VHF set（）the front of the wheelhouse.
What does the abbreviation VHF stand for?（）
I have been instructed that on my voyage（），I shall call at Maderra to pick up some cargo.
The generators on your rig have shut down，leaving you without navigation lights. Which emergency signal would you transmit over the VHF radio to alert vessels in the area of your predicament? （）