A.local-mode coverage
B.SAR operation
C.data process
D.continuous broadcast
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A.transmit distress signal
B.send response signal
C.transmit the signal of ship’s position
D.be started by X-band radar
A.the main source of energy
B.emergency source of electrical power
C.the reserve source of energy
D.all of above
A.Goonhilly, UK
B.Yamaguchi, Japan
C.Perth, Australia
D.Southbury, USA
A.180E above the equator
B.64.5 E over the IOR
C.15.5W along the straight line
D.55.5W above the equator
A.complicated circumstances
B.changeable atmospheric pressure
C.large density of traffic
D.some strong signals from unwanted satellites
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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.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
By using（）system a ship can send a distress message and know with certainty it will be received.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
The priority of EGC messages is classified by（）.
What following is not among the function of SOLAS ships?（）
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
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.