A.have received
B.have been received
C.are received
D.are being received
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A.400
B.240
C.450
D.180
A.on the bridge
B.in the coast station
C.on the forecastle
D.on starboard side
A.Navarea warnings
B.coastal warnings
C.local warnings
D.Meteorological warnings
A.Mobile Satellite Information
B.Motor ship Identification
C.Most Serious Information
D.Maritime Safety Information
A.receiving messages/one station
B.transmission/ one coast station or ship
C.communicating /one ship
D.contacting/other
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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.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
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.
Radio beacon can be activated（）in case of distress.
Ship-to-ship distress alerting should be conducted by（）.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
Please use（）for（）.
By using（）system a ship can send a distress message and know with certainty it will be received.
The rescue coordination center may（）on stations which interfere with traffic.