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°
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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
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
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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.
COSPAS-SARSAT is intended to be used for（）.
By using（）system a ship can send a distress message and know with certainty it will be received.
The advantage of geostationary satellites is（）.
The vessel has stayed in port for seven days because she needs（）.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
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.
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.
All coast radio stations（）DSC installed for VHF and HF.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.