A.to avoid mutual interference
B.to keep silence
C.owing to the time-share nature
D.to regulate transmitter power
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A.from any INMARSAT satellite
B.via any appropriate Navtex and EGC station
C.via the satellite the MES is tracking
D.from any RCC and coast station
A.four
B.six
C.five
D.three
A.selective and can be suppressed by ships
B.mandatory and can not be suppressed by ships in the affected area
C.not very important so that ships don‟t require them
D.received by all ships wherever they are
A.all vessels
B.selected groups of ships
C.a particular ship
D.A, B, C are all right
A.a coast station/a ship station
B.an EPIRB/a SART
C.ARQ/FEC
D.a back-up satellite/a land SAR unit
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（）will form the basis for distress alerting and safety calling.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
Radio beacon can be activated（）in case of distress.
The advantage of geostationary satellites is（）.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
We consider（）send a helicopter with medical facilities to the distress area.
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.
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.
By using（）system a ship can send a distress message and know with certainty it will be received.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.