A.promote
B.improve
C.guarantee
D.both A and B
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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
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
最新試題
Ship-to-ship distress alerting should be conducted by（）.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
The priority of EGC messages is classified by（）.
The advantage of geostationary satellites is（）.
Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,（）the equipment fitted on ship and the area in which the incident occurs.
By using（）system a ship can send a distress message and know with certainty it will be received.
（）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.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
Please use（）for（）.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.