A.sight or sound
B.seeing or sounding
C.visual or audible
D.seeing or hearing
您可能感興趣的試卷
你可能感興趣的試題
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
A.keep silence
B.interfere with such communication
C.establish communication as directed and render such assistance as is required and appropriate
D.refuse communication as directed and render such assistance as is required and appropriate
A.any appropriate channel except public communication
B.any appropriate channel except for public communications
C.any appropriate channel besides public communication
D.any appropriate channel beside public communication
A.between ship stations and shore-based communication networks
B.concern the management and operation of ships
C.may have an impact of the safety on ships
D.all of A, B, C
最新試題
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
The advantage of geostationary satellites is（）.
What following is not among the function of SOLAS ships?（）
The vessel has stayed in port for seven days because she needs（）.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
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.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
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.
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.