Aha Trivia Stuff Everyone Should Know
Aha Trivia: Stuff Everyone Should Know · ahatrivia.com/wfa-plb-purpose

What is a PLB mainly designed to do?

Send a 406 MHz distress alert to search and rescue is the key point.

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  1. Provide two-way casual texting
  2. Send a 406 MHz distress alert to search and rescue ✔
  3. Display a full topographic map

Why: A PLB is a battery-powered radio beacon designed to send a distress signal that satellites relay to search and rescue.

Huh, didn't know that: The international 406 MHz frequency is designated only for distress.

The dad joke
Why did the beacon bring a map? It liked to know where it was before saying hello.
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References

Answer: Send a 406 MHz distress alert to search and rescue. A PLB is a battery-powered radio beacon designed to send a distress signal that satellites relay to search and rescue.

  1. NOAA SARSAT System Overview www.sarsat.noaa.gov/cospas-sarsat-system-overview
    PLBs transmit the distress signal on the 406 MHz frequency.
    Checked 2026-10-21.

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