A.NAVTEX
B.EGC
C.HF-telex
D.all of above
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A.can be overcome by using traditional techniques
B.cannot be overcome by satellite system
C.can be overcome by satellite and digital techniques
D.cannot be tackled by any modern system
A.business opportunity
B.good-quality radio telephone conversations
C.telex service
D.both B and C
A.a fixed area or Navarea in any ocean region
B.a Navarea or weather forecast area
C.the designated area or given geographic position
D.anywhere of the world
A.automatically suppressed
B.finished by the operator
C.manually suppressed
D.done again
A.Ship stations
B.Coast stations
C.NCSs
D.NCC
最新試題
Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,()the equipment fitted on ship and the area in which the incident occurs.
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.
As each MSI message will have a unique identity, the printing of messages already received correctly is().
By using()system a ship can send a distress message and know with certainty it will be received.
The quality of EGC messages is()affected by the position of the ship, the time of reception and climatic conditions.
Please use()for().
The rescue coordination center may()on stations which interfere with traffic.
The vessel has stayed in port for seven days because she needs().
All coast radio stations()DSC installed for VHF and HF.