A.That
B./
C.When
D.What
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A.If
B.Whenever
C.Because
D.Where
A.transmit
B.to transmitting
C.transmitting
D.in transmitting
A.inspecting
B.inspected
C.inspects
D.having inspected
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
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The advantage of geostationary satellites is（）.
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.
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.
Radio communication（）for many years and helps to save tens of thousands of lives.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
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.
By using（）system a ship can send a distress message and know with certainty it will be received.
On-scene communications will normally take place between（）.
The vessel has stayed in port for seven days because she needs（）.