Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.

A.someone else will take his place
B.the captain will take charge of his work
C.nobody will be capable of doing his work
D.anyone else will use the radio equipment

A.receive shore-to-ship distress alerting
B.transmit ship-to-shore distress alerting
C.receive message for public correspondence
D.transmit and receive locating signals

A.an EGC receiver only
B.a satellite communication system
C.a HF radio system
D.a VHF with DSC system