A.180E above the equator
B.64.5 E over the IOR
C.15.5W along the straight line
D.55.5W above the equator
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A.complicated circumstances
B.changeable atmospheric pressure
C.large density of traffic
D.some strong signals from unwanted satellites
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
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
最新試題
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
The rescue coordination center may（）on stations which interfere with traffic.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
At least two two-way VHF radiotelephone apparatus shall be provided on every cargo ship of（）tons gross tonnage and upwards but less than 500 tons gross tonnage.
The vessel has stayed in port for seven days because she needs（）.
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.
Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,（）the equipment fitted on ship and the area in which the incident occurs.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
The advantage of geostationary satellites is（）.