A.How
B.What
C.Why
D.How about
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A.has been used
B.have been used
C.has used
D.have used
A.GMDSS
B.EGC
C.MSI
D.DSC
A.518
B.2182
C.156.8
D.2187.5
A.COSPAS-SARSAT
B.SATELLITE
C.terrestrial radio
D.INMARSAT
A.200
B.300
C.400
D.800
A.adherence to
B.adoption to
C.relaying on
D.usage of
A.an EGC receiver only
B.a satellite communication system
C.a HF radio system
D.a VHF with DSC system
A.the range of antenna can cover everywhere in the world
B.we can know the ship’s exact position
C.that the distress alert can be located as soon as possible
D.antenna of permanent earth stations may be directed towards fixed points in the sky
A.depend on
B.depending on
C.dependent on
D.depended on
A.taken
B.take
C.took
D.taked
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（）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.
SOLAS ships shall be equipped with（）.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
The priority of EGC messages is classified by（）.
Radio communication（）for many years and helps to save tens of thousands of lives.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
（）will form the basis for distress alerting and safety calling.
The rescue coordination center may（）on stations which interfere with traffic.