A.selective and can be suppressed by ships
B.mandatory and can not be suppressed by ships in the affected area
C.not very important so that ships don‟t require them
D.received by all ships wherever they are
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A.all vessels
B.selected groups of ships
C.a particular ship
D.A, B, C are all right
A.a coast station/a ship station
B.an EPIRB/a SART
C.ARQ/FEC
D.a back-up satellite/a land SAR unit
A.ship in distress and assisting units
B.NCS and RCC
C.RCCs and „0n-scene commander‟ or “co-ordinator surface search”
D.ship in distress and coast station
A.SES/DSC/EPIRB
B.SART/radiotelephone
C.COSPAS-SARSAT
D.both B and C
A.general communication
B.distress alerting and safety calling
C.receive MSI
D.both B and C
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Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
COSPAS-SARSAT is intended to be used for（）.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
The rescue coordination center may（）on stations which interfere with traffic.
All coast radio stations（）DSC installed for VHF and HF.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
SOLAS ships shall be equipped with（）.
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.
Every lifeboat which is fitted with a fixed two-way vhf radiotelephone apparatus with（）which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
Radio communication（）for many years and helps to save tens of thousands of lives.