A.easy and expensive
B.simple and certain
C.dangerous and stable
D.difficult and compulsory
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A.1980
B.1981
C.1979
D.1982
A.assist
B.send a rescue vessel
C.search the distress area
D.reach the distress position at once
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
最新試題
（）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.
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.
By using（）system a ship can send a distress message and know with certainty it will be received.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
The vessel has stayed in port for seven days because she needs（）.
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.
Ship-to-ship distress alerting should be conducted by（）.
Radio communication（）for many years and helps to save tens of thousands of lives.
（）will form the basis for distress alerting and safety calling.
We consider（）send a helicopter with medical facilities to the distress area.