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
The advantage of geostationary satellites is（）.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
Radio communication（）for many years and helps to save tens of thousands of lives.
The vessel has stayed in port for seven days because she needs（）.
Before GMDSS, if the radio officer on board is serious ill,（）.
On-scene communications will normally take place between（）.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
All coast radio stations（）DSC installed for VHF and HF.
COSPAS-SARSAT is intended to be used for（）.