A.FEC and ARQ
B.satellite and terrestrial communications
C.radio and telex
D.NBDP
您可能感興趣的試卷
你可能感興趣的試題
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
A.when two stations communicate with each other
B.in any radio system and at any time
C.when one ship sends a message to another station
D.for communication among some stations
A.SART
B.DSC
C.NBDP
D.RT
最新試題
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
Please use（）for（）.
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.
Ship-to-ship distress alerting should be conducted by（）.
Every lifeboat which is fitted with a fixed two-way（）radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
（）will form the basis for distress alerting and safety calling.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
The advantage of geostationary satellites is（）.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
International Navtex service means the coordinated broadcast and automatic reception on（）khz of maritime safety information by narrow-band direct-printing telegraphy using English language.