A.be transmitted at once though the frequency is not clear
B.be transmitted as soon as the frequency is cleared coordinately
C.be transmitted at its scheduled transmissions
D.be transmitted at next scheduled transmissions
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A.meteorological warnings
B.navigational warnings
C.search and rescue information
D.meteorological forecast
A.300
B.400
C.500
D.600
A.on the bridge
B.in the coast station
C.on the forecastle
D.on starboard side
A.subject for
B.liable to
C.easy to meet
D.always encounter
A.NBDP/VHF radio
B.Inmarsat safetyNet/NAVTEX
C.Safety service / Inmarsat-A
D.Long range / short range
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SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
The vessel has stayed in port for seven days because she needs（）.
（）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.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
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.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
SOLAS ships shall be equipped with（）.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
Ship-to-ship distress alerting should be conducted by（）.
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.