A.satellite and terrestrial communication systems
B.only navigational and alerting systems
C.just MSI system and locating system
D.SAR co-ordination system
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A.NAVTEX
B.EGC
C.HF-telex
D.all of above
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
最新試題
The rescue coordination center may（）on stations which interfere with traffic.
The priority of EGC messages is classified by（）.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
The advantage of geostationary satellites is（）.
By using（）system a ship can send a distress message and know with certainty it will be received.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
Ship-to-ship distress alerting should be conducted by（）.