A.Inmarsat-A
B.Inmarsat-C
C.Inmarsat-B
D.Inmarsat-M
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A.satellite EPIRBs
B.Non-satellite EPIRBs
C.SES and DSC
A.871
B.872
C.873
D.874
A.an CES / telex mode
B.an SES telex service
C.the service /the subscriber
D.a satellite /an ocean region
A.581
B.582
C.583
D.584
A.establish a communication channel from the CES, via the International Telex Network to the final destination
B.set up a communication channel from your SES, via a satellite, to a CES within your ocean region
C.set up a channel directly to the addressee at the destination
D.establish a channel from your terminal , via the International Telex Network to a CES within your ocean region
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By using（）system a ship can send a distress message and know with certainty it will be received.
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.
The priority of EGC messages is classified by（）.
Ship-to-ship distress alerting should be conducted by（）.
SOLAS ships shall be equipped with（）.
The advantage of geostationary satellites is（）.
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.
What following is not among the function of SOLAS ships?（）
Radio communication（）for many years and helps to save tens of thousands of lives.
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.