A.subject for
B.liable to
C.easy to meet
D.always encounter
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A.NBDP/VHF radio
B.Inmarsat safetyNet/NAVTEX
C.Safety service / Inmarsat-A
D.Long range / short range
A.FEC and ARQ
B.satellite and terrestrial communications
C.radio and telex
D.NBDP
A.by day or at night
B.almost round the clock
C.somewhat and sometime
D.from sunrise to sunset
A.transmit distress signal
B.send response signal
C.transmit the signal of ship‟s position
D.be interrogated by X-band radar
A.sight or sound
B.seeing or sounding
C.visual or audible
D.seeing or hearing
最新試題
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
The priority of EGC messages is classified by（）.
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.
On-scene communications will normally take place between（）.
By using（）system a ship can send a distress message and know with certainty it will be received.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
The advantage of geostationary satellites is（）.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.