A.frequency allocated
B.both language and frequency
C.language used
D.transmission power and time
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A.10 minutes every 4 hours
B.half an hour every other hour
C.irregular period of time
D.5 minutes every two hours
A.in any INMARSAT regions
B.in each NAVTEX area
C.at any distance
D.in Areas A3 and A4
A.navigational / typhoon
B.traffic / meteorological
C.marine / hurricane
D.navigational / meteorological
A.dedicated system
B.MSI broadcasts
C.518KHZ
D.channel 16
A.ship’s movement
B.safety
C.ship’s management
D.hazards
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SOLAS ships shall be equipped with（）.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
Every lifeboat which is fitted with a fixed two-way（）radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
Ship-to-ship distress alerting should be conducted by（）.
The priority of EGC messages is classified by（）.
Before GMDSS, if the radio officer on board is serious ill,（）.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
All coast radio stations（）DSC installed for VHF and HF.
Please use（）for（）.
The advantage of geostationary satellites is（）.