A.common communication system
B.distress traffic system
C.basic concept of GMDSS
D.SAR operation procedure
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A.ship-to-shore
B.shore-to –ship
C.bridge-to-bridge
A.general radio communication
B.MSI
C.improved distress and safety communication
D.bridge-to-bridge communication
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Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
（）by an ice-breaker, it is important to maintain a continuous listening watch on the appropriate VHF channel and to maintain a proper look-out for sound and visual signals.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
All coast radio stations（）DSC installed for VHF and HF.
What following is not among the function of SOLAS ships?（）