A.64.5E
B.178E
C.15.5W
D.54W
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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
A.transmit distress signal
B.send response signal
C.transmit the signal of ship‟s position
D.be start by X-band radar
最新試題
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
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.
Before GMDSS, if the radio officer on board is serious ill,（）.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
By using（）system a ship can send a distress message and know with certainty it will be received.
COSPAS-SARSAT is intended to be used for（）.
The advantage of geostationary satellites is（）.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.