A.NAVTEX
B.EGC
C.HF-telex
D.all of above
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A.can be overcome by using traditional techniques
B.cannot be overcome by satellite system
C.can be overcome by satellite and digital techniques
D.cannot be tackled by any modern system
A.business opportunity
B.good-quality radio telephone conversations
C.telex service
D.both B and C
A.a fixed area or Navarea in any ocean region
B.a Navarea or weather forecast area
C.the designated area or given geographic position
D.anywhere of the world
A.automatically suppressed
B.finished by the operator
C.manually suppressed
D.done again
A.Ship stations
B.Coast stations
C.NCSs
D.NCC
最新試題
Radio communication（）for many years and helps to save tens of thousands of lives.
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.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
The vessel has stayed in port for seven days because she needs（）.
The priority of EGC messages is classified by（）.
The rescue coordination center may（）on stations which interfere with traffic.
Ship-to-ship distress alerting should be conducted by（）.
The advantage of geostationary satellites is（）.