A.Because they are not engaged in the distress traffic
B.they will affect the transmission of the distress traffic
C.The powers of these stations are very weak
D.They are not in charge of search and rescue
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A.any appropriate channel except public communication
B.any appropriate channel except for public communications
C.any appropriate channel besides public communication
D.any appropriate channel beside public communication
A.The message can be directed to the desired location
B.The message can follow the earth’s curvature
C.The quality of message can not be affected by climatic
D.The range of the message extend and the quality of reception is improved
A.enter the system / contact an RCC
B.access to INMARSAT / establish contact with a CES
C.have absolute priority to enter the system / make contact with a CES
D.enter the system gradually / wait for rescue
A.easy and expensive
B.simple and certain
C.dangerous and stable
D.difficult and compulsory
A.1980
B.1981
C.1979
D.1982
最新試題
The advantage of geostationary satellites is（）.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
（）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.
By using（）system a ship can send a distress message and know with certainty it will be received.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
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.
On-scene communications will normally take place between（）.
Radio communication（）for many years and helps to save tens of thousands of lives.