A.business opportunity
B.good-quality radio telephone conversations
C.telex service
D.both B and C
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A.a fixed area or Navarea in any ocean region
B.a Navarea or weather forecast area
C.the designated area or given geographic position
D.anywhere of the world
A.automatically suppressed
B.finished by the operator
C.manually suppressed
D.done again
A.Ship stations
B.Coast stations
C.NCSs
D.NCC
A.NBDP
B.EGC receiver
C.NBDP or both
D.EGC receiver or both
A.the ship has received the DSC distress call on a HF frequency
B.the coast station concerned has not acknowledged it within 5 minutes
C.the ship will take command of search and rescue in 5 minutes
D.A and B
最新試題
The vessel has stayed in port for seven days because she needs（）.
COSPAS-SARSAT is intended to be used for（）.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
SOLAS ships shall be equipped with（）.
The rescue coordination center may（）on stations which interfere with traffic.
Ship-to-ship distress alerting should be conducted by（）.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
（）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.
Radio communication（）for many years and helps to save tens of thousands of lives.