I have carried a personal locator beacon on every solo backpacking trip for the last decade. The good news is that modern PLBs are reliable, the bad news is that the budget options on Amazon include knock-offs that are not actually COSPAS-SARSAT certified. Here are the five PLBs I would actually trust with my life.
| PLB | Battery Life | Buoyancy | Best For |
|---|---|---|---|
| ACR ResQLink View 425 | 28 hours active | Floats with pouch | Best overall |
| Ocean Signal RescueMe PLB1 | 24 hours active | Floats with pouch | Smallest size |
| ACR ResQLink 410 | 24 hours active | Floats with pouch | Best value |
| McMurdo FastFind 220 | 24 hours active | Sinks, needs pouch | Best for sailors |
| ACR Globalfix V5 EPIRB | 48 hours active | Floats fully | Marine use |
ACR ResQLink View 425
The ResQLink View is the PLB I carry on my own trips. It is the View version of the popular 410, which adds a small LCD screen that confirms GPS lock, transmission status, and battery condition. Three signal types: 406 MHz to satellites, 121.5 MHz for nearby aircraft homing, and an LED strobe for visual signaling at night. Battery lasts six years before the mandatory replacement. Compact, light, and built to MIL-STD ruggedness.
Ocean Signal RescueMe PLB1
The Ocean Signal PLB1 is the smallest certified PLB available. Roughly the size of a pack of gum, which makes it easy to clip to a PFD pocket or a backpack hip belt. Same 24-hour transmission time as larger units, same 406 MHz and 121.5 MHz signals, same GPS lock. The single button activation under a flip cover prevents accidents. Seven-year battery life. Costs about the same as the ResQLink 410 but smaller for the same capability.
ACR ResQLink 410
The ResQLink 410 is the cheaper sibling of the View 425, no LCD screen but the same signal performance and the same six-year battery life. For most backcountry users the LCD is not essential, you can confirm operation from the LED indicators. This is the PLB I recommend to someone buying their first one if budget matters. Same FCC and COSPAS-SARSAT certification as the more expensive models.
McMurdo FastFind 220
The FastFind 220 is the sailor’s PLB choice. Designed for life jacket attachment, six-year battery, and a rugged housing that has survived more sea trials than I can list. The down side is that it does not float on its own and needs the included pouch to stay on the surface. Same dual-frequency signal as the ACR units and same global COSPAS-SARSAT coverage.
ACR Globalfix V5 EPIRB
Technically an EPIRB rather than a PLB, but worth listing for serious marine use. EPIRBs are designed for boats rather than people, with larger size, longer transmission time, and Category I auto-deployment options. The Globalfix V5 has 48 hours of transmission time, GPS, and floats free if your boat goes down. If you are at sea more than a few miles from shore, an EPIRB is the right tool, not a PLB.
What Matters Most
COSPAS-SARSAT certification is the only thing that matters for SOS reliability. Anything not on that list is not really a PLB. GPS lock speed matters because faster lock means more accurate coordinates to rescuers. Battery shelf life matters because PLBs sit unused for years and the battery still needs to fire on demand. Size and weight matter because a PLB you leave in the car does no good in an emergency.
My Setup
I clip a ResQLink View 425 to the top of my backpack hip belt with the antenna pointed up and unobstructed. For solo trips I also carry a Garmin inReach Mini 2 because the two-way text capability is useful for non-emergencies. I test my PLB in test mode every six months and confirm GPS lock acquisition time. I registered through NOAA the day I bought it.
Common Mistakes
Do not buy a non-certified Chinese knock-off, the rescue services do not know what to do with the signal. Do not skip registration with NOAA. Do not store the PLB inside a metal container or in a sealed pack where the antenna cannot transmit. Do not test outside of test mode, every false activation puts SAR teams on alert and you may be billed for the response.
Final Recommendation
For most backcountry users the ACR ResQLink View 425 is the right PLB. The LCD screen is worth the small upcharge for the peace of mind during activation. Step down to the 410 if cost matters or pick the Ocean Signal PLB1 for the smallest size. Sailors should consider the FastFind 220 or step up to the Globalfix V5 EPIRB for offshore voyages.
Frequently asked questions
What is the difference between a PLB and a satellite messenger like Garmin inReach?+
PLBs are SOS-only with no subscription, governed by the COSPAS-SARSAT system, and lasting 6 to 10 years on the original battery. Satellite messengers add two-way texting and tracking but require monthly subscriptions and have shorter battery life. Many hikers carry one of each.
Do I need to register my PLB?+
Yes, registration is free and legally required in the US through NOAA. Registration links your beacon's unique ID to your contact info, medical history, and emergency contacts. Unregistered beacons still trigger rescue but with significant delays.