A.ship-to-shore
B.shore-to –ship
C.bridge-to-bridge
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A.general radio communication
B.MSI
C.improved distress and safety communication
D.bridge-to-bridge communication
A.ITU
B.IMO
C.MSC
D.WMO
A.promote
B.improve
C.guarantee
D.both A and B
A.taking the place of the radio system
B.introducing a new life-saving system
C.saving the vessels in distress
D.improving the communication on land
A.was suffering
B.is suffering
C.has suffered
D.has been suffering
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Please use（）for（）.
Radio beacon can be activated（）in case of distress.
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.
Ship-to-ship distress alerting should be conducted by（）.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
At least two two-way VHF radiotelephone apparatus shall be provided on every cargo ship of（）tons gross tonnage and upwards but less than 500 tons gross tonnage.
The rescue coordination center may（）on stations which interfere with traffic.
International Navtex service means the coordinated broadcast and automatic reception on（）khz of maritime safety information by narrow-band direct-printing telegraphy using English language.