A.location and capacity of the facilities located on board ships
B.Position and type of a sincere sintion
C.Capacity and location of shore based communication facilities
D.Position and capacity of mobile communication stations
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A.64.5E
B.178E
C.15.5W
D.54W
A.communications in the whole system will stop
B.the global system will be damaged
C.the back-up one will take its place
D.the whole system will not work
A.besides the polar regions
B.including the North Pole and the South Pole
C.above 70N and below 70S
D.as far north and south 70
A.satellite network
B.Satellite Link
C.INMARSAT
D.Satellite System
A.To run faster than ever
B.To go forward
C.To march without stopping
D.A significant symbol of a great improvement in maritime communication
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（）will form the basis for distress alerting and safety calling.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
COSPAS-SARSAT is intended to be used for（）.
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 advantage of geostationary satellites is（）.
By using（）system a ship can send a distress message and know with certainty it will be received.
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.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
The rescue coordination center may（）on stations which interfere with traffic.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.