A.the weather is always terrible
B.the condition there is complicated
C.the signals are too strong
D.their SES may recive the signals from unwanted satellite
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A.international NAVTEX Service
B.FleetNET Service
C.SafetyNet Service
D.WWNWS
A.can suppress
B.can be suppressed
C.can not be suppressed
D.are to be suppressed
A.frequency allocated
B.both language and frequency
C.language used
D.transmission power and time
A.10 minutes every 4 hours
B.half an hour every other hour
C.irregular period of time
D.5 minutes every two hours
A.on the bridge
B.in the coast station
C.on the forecastle
D.on starboard side
最新試題
Radio beacon can be activated（）in case of distress.
（）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.
（）will form the basis for distress alerting and safety calling.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
All coast radio stations（）DSC installed for VHF and HF.
Ship-to-ship distress alerting should be conducted by（）.
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.
On-scene communications will normally take place between（）.
COSPAS-SARSAT is intended to be used for（）.