A.assist
B.send a rescue vessel
C.search the distress area
D.reach the distress position at once
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A.alternation
B.alternate
C.alter
D.alternative
A.all ships in a large sea area
B.only the sea authorities ashore
C.the SAR units ashore and at sea
D.the port radios and the coast stations
A.some
B.lots of
C.many
D.all
A.impossible
B.possible
C.easy
D.difficult
A.climate
B.sunshine
C.human beings
D.both a and b
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The rescue coordination center may（）on stations which interfere with traffic.
All coast radio stations（）DSC installed for VHF and HF.
Before GMDSS, if the radio officer on board is serious ill,（）.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
The priority of EGC messages is classified by（）.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
SOLAS ships shall be equipped with（）.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
At least two two-way VHF radiotelephone apparatus shall be provided on every cargo ship of（）tons gross tonnage and upwards but less than 500 tons gross tonnage.