177. Which of the following statements concerning COSPAS-SARSAT is false?

406 MHz EPIRBs are units that are used as alerting devices.
Doppler frequency measurements provide more precise locations than GPIRB signals .
The Doppler frequency measurement concept is used to determine the EPIRB's location.
Satellites in a low-earth polar orbit detect EPIRB beacons on 406 MHz and relay the information to a Local User Terminal (LUT).

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