A.a terrestrial MF system
B.a satellite communication system
C.a land HF radio system
D.a coastal VHF system
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A.Russian
B.French
C.English
D.German
A.transmit distress signal
B.send response signal
C.transmit the signal of ship‟s position
D.be start by X-band radar
A.consists of
B.is consisted of
C.consisted of
D.are consisted of
A.urgent traffic
B.distress alert
C.routine traffic
D.NAVTEX message
A.satellite and terrestrial communication systems
B.only navigational and alerting systems
C.just MSI system and locating system
D.SAR co-ordination system
最新試題
Radio communication（）for many years and helps to save tens of thousands of lives.
COSPAS-SARSAT is intended to be used for（）.
Ship-to-ship distress alerting should be conducted by（）.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
The vessel has stayed in port for seven days because she needs（）.
Every lifeboat which is fitted with a fixed two-way（）radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
Distress traffic is the communication（）between the station in distress and the ships, aircraft, coast radio stations, coast earth stations and rescue centers participating in the rescue work.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
We consider（）send a helicopter with medical facilities to the distress area.
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.