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
Radio beacon can be activated（）in case of distress.
What following is not among the function of SOLAS ships?（）
COSPAS-SARSAT is intended to be used for（）.
All coast radio stations（）DSC installed for VHF and HF.
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.
The advantage of geostationary satellites is（）.
The priority of EGC messages is classified by（）.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
Radio communication（）for many years and helps to save tens of thousands of lives.
（）will form the basis for distress alerting and safety calling.