A.can suppress
B.can be suppressed
C.can not be suppressed
D.are to be suppressed
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A.frequency allocated
B.both language and frequency
C.language used
D.transmission power and time
A.10 minutes every 4 hours
B.half an hour every other hour
C.irregular period of time
D.5 minutes every two hours
A.on the bridge
B.in the coast station
C.on the forecastle
D.on starboard side
A.search and rescue
B.safe
C.co-ordinated
D.hydrographic
A.special
B.different
C.expensive
D.valuable
最新試題
Ship-to-ship distress alerting should be conducted by（）.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
On-scene communications will normally take place between（）.
All coast radio stations（）DSC installed for VHF and HF.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
（）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.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
Before GMDSS, if the radio officer on board is serious ill,（）.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
What following is not among the function of SOLAS ships?（）