A.Local User Terminal
B.Spacecraft
C.Local-mode coverage
D.Near polar orbiting satellites
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A.1992
B.1980
C.1984
D.1988
A.distress alerting
B.communication
C.broadcasting MSI
D.on-scene communication
A.free reception
B.free transmission
C.dedicated reception
D.dedicated transmission
A.A NAVTEX receiver
B.An EGC receiver
C.MF/HF radio telephone
D.HF radio telephone with NBDP
A.a fixed area or Navarea in any ocean region
B.a Navarea or weather forecast area
C.the designated area or given geographic position
D.anywhere of the world
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Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
（）will form the basis for distress alerting and safety calling.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
Radio beacon can be activated（）in case of distress.
Ship-to-ship distress alerting should be conducted by（）.
（）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.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
All coast radio stations（）DSC installed for VHF and HF.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.