A.the weather over there is always terrible
B.the condition there is complicated
C.the signals are too strong
D.their SES may receive the signals from unwanted satellite
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A.sometimes
B.all times
C.never
D.partly
A.the only preamble
B.a part of the preamble
C.the closing
D.the suspension
A.have received
B.have been received
C.are received
D.are being received
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
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The rescue coordination center may（）on stations which interfere with traffic.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
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.
What following is not among the function of SOLAS ships?（）
The vessel has stayed in port for seven days because she needs（）.
The advantage of geostationary satellites is（）.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
（）will form the basis for distress alerting and safety calling.
We consider（）send a helicopter with medical facilities to the distress area.
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.