A.the range of antenna can cover everywhere in the world
B.we can know the ship’s exact position
C.that the distress alert can be located as soon as possible
D.antenna of permanent earth stations may be directed towards fixed points in the sky
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最新試題
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
The advantage of geostationary satellites is（）.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
At least two two-way VHF radiotelephone apparatus shall be provided on every cargo ship of（）tons gross tonnage and upwards but less than 500 tons gross tonnage.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
Please use（）for（）.
The vessel has stayed in port for seven days because she needs（）.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.