A.Space Segment, NCC, RCC, SES, and CES
B.Space Segment, a satellite system, C system, NCC and NCS
C.Space Segment, NCC, NCS, CES and SES
D.A system, C system, satellite system, earth stations and NCS
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A.4
B.9
C.8
D.5
A.the weather is always terrible
B.the condition there is complicated
C.the signals are too strong
D.their SES may recive the signals from unwanted satellite
A.international NAVTEX Service
B.FleetNET Service
C.SafetyNet Service
D.WWNWS
A.can suppress
B.can be suppressed
C.can not be suppressed
D.are to be suppressed
A.frequency allocated
B.both language and frequency
C.language used
D.transmission power and time
最新試題
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
Radio beacon can be activated（）in case of distress.
The rescue coordination center may（）on stations which interfere with traffic.
By using（）system a ship can send a distress message and know with certainty it will be received.
Radio communication（）for many years and helps to save tens of thousands of lives.
SOLAS ships shall be equipped with（）.
The priority of EGC messages is classified by（）.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
Every lifeboat which is fitted with a fixed two-way vhf radiotelephone apparatus with（）which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
（）by an ice-breaker, it is important to maintain a continuous listening watch on the appropriate VHF channel and to maintain a proper look-out for sound and visual signals.