A.distress alerting
B.communication
C.broadcasting MSI
D.on-scene communication
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A.free reception
B.free transmission
C.dedicated reception
D.dedicated transmission
A.A NAVTEX receiver
B.An EGC receiver
C.MF/HF radio telephone
D.HF radio telephone with NBDP
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.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.consists of
B.can be received
C.is transmitted by
D.Are made on
最新試題
Radio communication（）for many years and helps to save tens of thousands of lives.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
Before GMDSS, if the radio officer on board is serious ill,（）.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
The rescue coordination center may（）on stations which interfere with traffic.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
At least two two-way VHF radiotelephone apparatus shall be provided on every cargo ship of（）tons gross tonnage and upwards but less than 500 tons gross tonnage.
Please use（）for（）.
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.