A.1982
B.1980
C.1984
D.1988
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A.alerting
B.on-scene communication
C.safety information
D.general communication
A.sometimes
B.all times
C.never
D.partly
A.to avoid mutual interference
B.to keep silence
C.owing to the time-share nature
D.to regulate transmitter power
A.from any INMARSAT satellite
B.via any appropriate Navtex and EGC station
C.via the satellite the MES is tracking
D.from any RCC and coast station
A.four
B.six
C.five
D.three
最新試題
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
The priority of EGC messages is classified by（）.
By using（）system a ship can send a distress message and know with certainty it will be received.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
（）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 rescue coordination center may（）on stations which interfere with traffic.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
SOLAS ships shall be equipped with（）.
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.
The advantage of geostationary satellites is（）.