A.any appropriate channel except public communication
B.any appropriate channel except for public communications
C.any appropriate channel besides public communication
D.any appropriate channel beside public communication
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A.The message can be directed to the desired location
B.The message can follow the earth’s curvature
C.The quality of message can not be affected by climatic
D.The range of the message extend and the quality of reception is improved
A.enter the system / contact an RCC
B.access to INMARSAT / establish contact with a CES
C.have absolute priority to enter the system / make contact with a CES
D.enter the system gradually / wait for rescue
A.easy and expensive
B.simple and certain
C.dangerous and stable
D.difficult and compulsory
A.1980
B.1981
C.1979
D.1982
A.assist
B.send a rescue vessel
C.search the distress area
D.reach the distress position at once
最新試題
Radio communication（）for many years and helps to save tens of thousands of lives.
Please use（）for（）.
The priority of EGC messages is classified by（）.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
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.
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.
We consider（）send a helicopter with medical facilities to the distress area.
By using（）system a ship can send a distress message and know with certainty it will be received.
Before GMDSS, if the radio officer on board is serious ill,（）.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.