A.VHF
B.SART
C.NAVTEX
D.LES
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A.forward error correction
B.aftward error correction
C.DGPS
D.error-free and low error reception
A.At least two years after the last entry
B.At least one year after the last entry
C.At least 90 days after the last entry
D.At least 30 days after the last entry
A.LES
B.ESA
C.NCS
D.EGC
A.daily testing
B.either A or C
C.operational use of the equipment
D.testing at least every 48 hours
A.INMARSAT A
B.INMARSAT C
C.SafetyNET
D.NAVTEX
最新試題
The advantage of geostationary satellites is（）.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
Radio communication（）for many years and helps to save tens of thousands of lives.
The rescue coordination center may（）on stations which interfere with traffic.
COSPAS-SARSAT is intended to be used for（）.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
Every lifeboat which is fitted with a fixed two-way vhf radiotelephone apparatus with（）which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
What following is not among the function of SOLAS ships?（）