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
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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
A.assist
B.send a rescue vessel
C.search the distress area
D.reach the distress position at once
A.alternation
B.alternate
C.alter
D.alternative
最新試題
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
Ship-to-ship distress alerting should be conducted by（）.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
The vessel has stayed in port for seven days because she needs（）.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
Every lifeboat which is fitted with a fixed two-way（）radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
Before GMDSS, if the radio officer on board is serious ill,（）.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
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.