A.Radio link
B.Space segment
C.Satellite link
D.upper link
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A.a terrestrial MF system
B.a satellite communication system
C.a land HF radio system
D.a coastal VHF system
A.Russian
B.French
C.English
D.German
A.transmit distress signal
B.send response signal
C.transmit the signal of ship‟s position
D.be start by X-band radar
A.consists of
B.is consisted of
C.consisted of
D.are consisted of
A.urgent traffic
B.distress alert
C.routine traffic
D.NAVTEX message
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Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
On-scene communications will normally take place between（）.
Please use（）for（）.
（）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.
Radio communication（）for many years and helps to save tens of thousands of lives.
The rescue coordination center may（）on stations which interfere with traffic.
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.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
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.