In the GMDSS, for which purposes is the frequency band 406-406.1 MHz used?
A. For handling of distress traffic by aeronautical radio stations.
B. For radio traffic regarding the safety of navigation exclusively.
C. For satellite emergency position-indicating beacons exclusively.
D. For distress and safety traffic in radio telephony.
查看答案
What priority code is associated with routine calls made via INMARSAT-B?
A. 0
B. 1
C. 2
D. 3
How is maximum coverage provided by satellites in the GMDSS?
A. There are four satellites in polar orbit.
B. There are four satellites in geostationary orbit.
C. Each service (INMARSAT-F, -B, -C and –M) has four satellites in orbit.
D. GMDSS optimizes coordinated use of COSPAS-SARSAT satellites.
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