A.one means, whether satellite or terrestrial techniques
B.two means, whether satellite or terrestrial techniques
C.two separate and independent means, each using different radio communication services
D.two means, such as MF DSC and HF DSC
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A.satellite /terrestrial system
B.INMAARSAT/COSPAS-SARSAT
C.SART / EPIRB
D.geostationary/polar-orbiting satellites
A.enable SAR operations to start with minimum delay
B.give facilities to marine communication
C.reduce sharply the chances of ship’s sinking
D.both A and C
A.occasionally
B.accidentally
C.often
D.usually
A.keep
B.kept
C.are keeping
D.have kept
A.has made
B.make
C.has been made
D.is making
最新試題
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.
SOLAS ships shall be equipped with（）.
Radio communication（）for many years and helps to save tens of thousands of lives.
Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,（）the equipment fitted on ship and the area in which the incident occurs.
All coast radio stations（）DSC installed for VHF and HF.
By using（）system a ship can send a distress message and know with certainty it will be received.
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.
（）will form the basis for distress alerting and safety calling.
The vessel has stayed in port for seven days because she needs（）.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.