A.satellite /terrestrial system
B.INMAARSAT/COSPAS-SARSAT
C.SART / EPIRB
D.geostationary/polar-orbiting satellites
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A.enable SAR operations to start with minimum delay
B.give facilities to marine communication
C.reduce sharply the chances of ship’s sinking
D.both A and C
A.occasionally
B.accidentally
C.often
D.usually
A.keep
B.kept
C.are keeping
D.have kept
A.has made
B.make
C.has been made
D.is making
A.When the distress alert is sounded
B.When the emergency equipment is switching on
C.When the general emergency alarm is sounded
D.When the distress broadcast is sounded
最新試題
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
Before GMDSS, if the radio officer on board is serious ill,（）.
Radio beacon can be activated（）in case of distress.
International Navtex service means the coordinated broadcast and automatic reception on（）khz of maritime safety information by narrow-band direct-printing telegraphy using English language.
（）will form the basis for distress alerting and safety calling.
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.
COSPAS-SARSAT is intended to be used for（）.
The priority of EGC messages is classified by（）.