A.Distress, Urgency and Safety
B.Vital, Important and Routine
C.NAVAREA, Coastal and local
D.gale, Tsunami and Ice
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A.1,2
B.2,3
C.2,1
D.3,2
A.medical assistance
B.medical advise
C.maritime assistance
D.technical assistance
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
A.The SES
B.The space segment
C.Any CES
D.The CES decided by the applicant
A.ITU
B.IMO
C.INMARSAT ORGANIZATION
D.the nearest CES
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In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
Every lifeboat which is fitted with a fixed two-way vhf radiotelephone apparatus with（）which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
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.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
（）will form the basis for distress alerting and safety calling.
SOLAS ships shall be equipped with（）.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
Please use（）for（）.
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.
Before GMDSS, if the radio officer on board is serious ill,（）.