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PLB & communicator buying help

Frequently Asked Questions

What is the difference between a PLB and a satellite communicator?

A personal locator beacon is a one-way distress device that sends your GPS position to search and rescue over the 406 MHz COSPAS-SARSAT network with no subscription. A satellite communicator does that plus two-way text messaging, weather, and tracking on a paid plan, so it handles both emergencies and routine contact.

Do personal locator beacons require a subscription?

No, a true 406 MHz personal locator beacon needs no subscription or monthly fee because it transmits to the free government COSPAS-SARSAT satellite network. Satellite communicators are different: they require an active subscription plan to send messages, request weather, and use real-time tracking, though their SOS function still reaches a response center.

Do you have to register a personal locator beacon?

Yes. In the United States you must register a 406 MHz PLB for free with NOAA, which assigns a unique identification number tied to your contact and emergency information. Registration helps rescuers respond faster and verify alerts. Satellite communicators are registered with the device maker when you activate your service plan.

Does a PLB work without cell service?

Yes. Both PLBs and satellite communicators are built specifically to work where there is no cell coverage. They transmit through satellite networks rather than cell towers, so they function over remote terrain, mountains, and open water. That independence from ground infrastructure is exactly why pilots carry them on backcountry and overwater flights.

How long does a PLB battery last?

A 406 MHz personal locator beacon is required to transmit continuously for a minimum of 24 hours once activated, and its non-rechargeable battery typically holds a multi-year storage life before replacement. Satellite communicators use rechargeable batteries rated in days of normal use, so charge yours before every remote flight.

Is a satellite communicator worth it for pilots?

For pilots who fly over remote terrain or water where cell signal does not reach, yes. A satellite communicator provides SOS alerting plus two-way messaging, weather, and tracking so family and flight operations can follow your progress. It turns a single emergency button into an everyday safety and communication tool you will actually use.