单项选择题
An SES operator can chose the most suitable CESs according to（）.
A.the routing agreement for a particular ocean region
B.The communication service he required
C.the positions of his ship and the CESs
D.B and C
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相关考题
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单项选择题
The NCS of INMARSAT-A system in the AOR-E is in（）.
A.Goonhilly, UK
B.Yamaguchi, Japan
C.Perth, Australia
D.Southbury, USA -
单项选择题
Each NCS woks as a type of（）, assisting controlling and monitoring telex and telephone network as quickly as possible.
A.switch operator
B.communication gateway
C.national operator
D.on-scene commande -
单项选择题
The position of the AOR-W satellite in the INMARSAT system is（）above the equator.
A.64.5E
B.178E
C.15.5W
D.54W
