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
The vessel has stayed in port for seven days because she needs（）.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
We consider（）send a helicopter with medical facilities to the distress area.
The advantage of geostationary satellites is（）.
Please use（）for（）.
Radio beacon can be activated（）in case of distress.
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.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
The rescue coordination center may（）on stations which interfere with traffic.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.