A.Goonhilly, UK
B.Yamaguchi, Japan
C.Perth, Australia
D.Southbury, USA
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A.switch operator
B.communication gateway
C.national operator
D.on-scene commande
A.64.5E
B.178E
C.15.5W
D.54W
A.always move slowly
B.are in one place only
C.sometimes move and sometime don‟t
D.synchronize with the movement of the earth
A.Radio link
B.Space segment
C.Satellite link
D.upper link
A.a terrestrial MF system
B.a satellite communication system
C.a land HF radio system
D.a coastal VHF system
最新試題
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
COSPAS-SARSAT is intended to be used for（）.
The priority of EGC messages is classified by（）.
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.
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.
By using（）system a ship can send a distress message and know with certainty it will be received.
All coast radio stations（）DSC installed for VHF and HF.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.