A.as many as three
B.more than two
C.less than two
D.up to four
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A.3
B.4
C.8
D.12
A.besides the polar regions
B.including the North Pole and the South Pole
C.above 70°N and below 70°S
D.as for north and south as 70°
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
A.meteorological warnings
B.navigational warnings
C.search and rescue information
D.meteorological forecast
A.300
B.400
C.500
D.600
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SOLAS ships shall be equipped with（）.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
The priority of EGC messages is classified by（）.
Distress traffic is the communication（）between the station in distress and the ships, aircraft, coast radio stations, coast earth stations and rescue centers participating in the rescue work.
Please use（）for（）.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
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.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
Before GMDSS, if the radio officer on board is serious ill,（）.