A.radio direction-finding apparatus
B.DSC
C.NAVTEX
D.EPIRB
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A.871
B.872
C.873
D.874
A.routine
B.distress
C.urgency
D.safety
A.581
B.582
C.583
D.584
A.routine
B.distress
C.urgency
D.safety
A.Network
B.The CES preferred by the applicant
C.INMARSAT
D.The SES itself
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Radio communication（）for many years and helps to save tens of thousands of lives.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
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 ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
The priority of EGC messages is classified by（）.
SOLAS ships shall be equipped with（）.
We consider（）send a helicopter with medical facilities to the distress area.
All coast radio stations（）DSC installed for VHF and HF.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
What following is not among the function of SOLAS ships?（）