A.between ship stations and shore-based communication networks
B.concern the management and operation of ships
C.may have an impact of the safety on ships
D.all of A, B, C
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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.are capable of following / distance
B.can follow / altitude
C.can hardly follow / shape
D.are unable following / angle
A.quick and good
B.convenient and certain
C.easily and simply
D.important and difficult
A.living standards
B.survival condition
C.chance of survival
D.technical specification
A.they all have different limitations with respect to coverage
B.they all have different limitations in the technology they use
C.different systems apply to different ships
D.all of above
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Before GMDSS, if the radio officer on board is serious ill,（）.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
The vessel has stayed in port for seven days because she needs（）.
Ship-to-ship distress alerting should be conducted by（）.
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.
COSPAS-SARSAT is intended to be used for（）.
The advantage of geostationary satellites is（）.
Please use（）for（）.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
SOLAS ships shall be equipped with（）.