A.besides the polar regions
B.including the North Pole and the South Pole
C.above 70N and below 70S
D.as far north and south 70
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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
A.4
B.9
C.8
D.5
A.the weather over there is always terrible
B.the condition there is complicated
C.the signals are too strong
D.their SES may receive the signals from unwanted satellite
A.sometimes
B.all times
C.never
D.partly
A.the only preamble
B.a part of the preamble
C.the closing
D.the suspension
最新試題
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
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 quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
COSPAS-SARSAT is intended to be used for（）.
The advantage of geostationary satellites is（）.
Radio communication（）for many years and helps to save tens of thousands of lives.
What following is not among the function of SOLAS ships?（）
Radio beacon can be activated（）in case of distress.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
On-scene communications will normally take place between（）.