EPIRBs and PLBs are both emergency locator beacons, but they are not the same tool. This guide explains what each one stands for, when to choose each, and what to compare before buying.
An EPIRB is usually treated as a vessel emergency beacon. It is meant to help search-and-rescue services identify and locate a boat or life raft in a serious distress situation.
A PLB is a personal emergency beacon. It is carried by a person, not permanently assigned to the boat, and can be useful for kayaks, tenders, crew carry, or solo boating.
| Compare | EPIRB | PLB |
|---|---|---|
| Best for | Boat-level emergency alerting | Personal emergency carry |
| Typical owner | The vessel / boat setup | The individual person |
| Use case | Offshore, coastal cruising, larger boats, ditch bag | Kayak, tender, crew member, solo boater, backup beacon |
| Activation | Depends on model; some are manual, some automatic/float-free | Generally manual personal activation |
| Portability | Larger; stays with boat or ditch bag | Smaller; carried on person or PFD |
| Buying focus | GPS, AIS, float-free/manual category, battery date, mounting, registration | GPS, size, waterproofing, battery date, clip/float pouch, registration |
Look for modern 406 MHz beacon support. GPS helps speed location accuracy. Some newer marine beacons also include AIS or return-link features depending on model.
If the beacon should stay with the boat, start with EPIRB. If it should stay with a person, start with PLB.
Check how the beacon is registered, whether the battery/service date is fresh, and whether the seller is reputable before purchase.
Not always. A PLB is excellent personal backup, but an EPIRB is usually the better primary beacon for a boat or offshore ditch bag. Many serious boaters use both: EPIRB for the vessel, PLB for the person.
Yes. A beacon alerts search-and-rescue, but a VHF radio lets you talk to nearby vessels and the Coast Guard. They solve different problems.
Usually no. Compare GPS support, battery expiration/service life, water rating, size, mounting/carry method, and whether it fits your boating style.
An EPIRB should be easy to reach in a vessel emergency. A PLB should be carried on the person, ideally attached to a PFD or kept in a grab-ready location.