A.free reception
B.free transmission
C.dedicated reception
D.dedicated transmission
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A.A NAVTEX receiver
B.An EGC receiver
C.MF/HF radio telephone
D.HF radio telephone with NBDP
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.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.consists of
B.can be received
C.is transmitted by
D.Are made on
A.double frequencies
B.single frequency
C.dedicated frequency
D.multiple frequencies
最新試題
（）by an ice-breaker, it is important to maintain a continuous listening watch on the appropriate VHF channel and to maintain a proper look-out for sound and visual signals.
The advantage of geostationary satellites 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.
SOLAS ships shall be equipped with（）.
What following is not among the function of SOLAS ships?（）
Radio beacon can be activated（）in case of distress.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
By using（）system a ship can send a distress message and know with certainty it will be received.
Before GMDSS, if the radio officer on board is serious ill,（）.