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A PLB certainly is different than an EPIRB.

My PLB has an EPIRB built into it.
Read about them and then you'll know.

here's how they work

GARY


I think you're confusing the old obsolete 121.5Mhz only EPIRBs with the modern 406Mhz / 121.5Mhz units. I can't find any difference between a 'PLB' and an 'EPIRB' other than battery life. Both use the 406Mhz signal and have optional positioning broadcast capability.

Jake Kohl