A.fixed
B.matched
C.fitted
D.equal
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A.square
B.triangle
C.circle
D.rectangle
A.cannot
B.are not allowed
C.have the right
D.should get permission to
A.every two years
B.every three years
C.every year
D.every four years
A.the radio regulations
B.the technical terms and definitions
C.how to operate the GMDSS SES equipment
D.Maritime Communications
A.alphabetical
B.figure
C.name of stations
D.series
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On-scene communications will normally take place between（）.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
The vessel has stayed in port for seven days because she needs（）.
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.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
All coast radio stations（）DSC installed for VHF and HF.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
Radio beacon can be activated（）in case of distress.
Ship-to-ship distress alerting should be conducted by（）.
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.