A.inspecting
B.inspected
C.inspects
D.having inspected
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A.coming into effect
B.moving to full effect
C.being based on force
D.coming into force
A.fixed
B.matched
C.fitted
D.equal
A.square
B.triangle
C.circle
D.rectangle
A.cannot
B.are not allowed
C.have the right
D.should get permission to
A.every two years
B.every three years
C.every year
D.every four years
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By using（）system a ship can send a distress message and know with certainty it will be received.
The priority of EGC messages is classified 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.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
SOLAS ships shall be equipped with（）.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
International Navtex service means the coordinated broadcast and automatic reception on（）khz of maritime safety information by narrow-band direct-printing telegraphy using English language.
We consider（）send a helicopter with medical facilities to the distress area.
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.