A.switch operator
B.communication gateway
C.national operator
D.on-scene commande
您可能感興趣的試卷
你可能感興趣的試題
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
A.Russian
B.French
C.English
D.German
最新試題
SOLAS ships shall be equipped with（）.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
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.
Radio communication（）for many years and helps to save tens of thousands of lives.
Ship-to-ship distress alerting should be conducted by（）.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
Before GMDSS, if the radio officer on board is serious ill,（）.
Radio beacon can be activated（）in case of distress.