A.sight or sound
B.seeing or sounding
C.visual or audible
D.seeing or hearing
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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
COSPAS-SARSAT is intended to be used for（）.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
We consider（）send a helicopter with medical facilities to the distress area.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
SOLAS ships shall be equipped with（）.
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.
What following is not among the function of SOLAS ships?（）
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
Before GMDSS, if the radio officer on board is serious ill,（）.