A.taking the place of the radio system
B.introducing a new life-saving system
C.saving the vessels in distress
D.improving the communication on land
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A.was suffering
B.is suffering
C.has suffered
D.has been suffering
A.see
B.seeing
C.be seen
D.being seen
A.where
B.when
C.after
D.unless
A.That
B./
C.When
D.What
A.If
B.Whenever
C.Because
D.Where
最新試題
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
（）by an ice-breaker, it is important to maintain a continuous listening watch on the appropriate VHF channel and to maintain a proper look-out for sound and visual signals.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
Please use（）for（）.
What following is not among the function of SOLAS ships?（）
At least two two-way VHF radiotelephone apparatus shall be provided on every cargo ship of（）tons gross tonnage and upwards but less than 500 tons gross tonnage.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
We consider（）send a helicopter with medical facilities to the distress area.
Before GMDSS, if the radio officer on board is serious ill,（）.