Best PLB for Offshore Workers UK — Honest Buyers Guide
Best PLB for Offshore Workers UK — Honest Buyers Guide
I’ll be straight with you — I have seen PLBs in training but have never had to activate one in a real emergency. And honestly, I’m glad I haven’t needed to. The whole idea of a PLB is that you hope you never need it. But the one time you do need it and its not there, then what?
So here is everything you need to know about PLBs in plain English, including the ones I would personally recommend based on research, reviews, and what I have learned working offshore.
What Is a PLB?
A PLB — Personal Locator Beacon — is a small handheld device that sends a distress signal via satellite when activated. It is registered to you as an individual, not a vessel, which makes it different from an EPIRB, check the latest comparison article. You clip it to your lifejacket, put it in a pocket, or mount it on your kit — and it goes wherever you go.
When you activate it, it transmits your GPS location on 406MHz to the Cospas-Sarsat satellite network — the only internationally recognised dedicated search and rescue satellite system. That signal goes directly to a rescue coordination centre who then contact the nearest coastguard or rescue service. No mobile signal needed. No WiFi. It works anywhere in the world – cool right?
Important UK Regulation Update for 2026
As of 15 April 2026, it is now a legal requirement to register all 406MHz PLBs carried on UK-flagged vessels and powered watercraft. Registration is free at beaconregistration.admiralty.co.uk. If your PLB is not registered and you activate it, rescue services do not know who you are or what vessel you were on — which slows everything down when speed is literally life or death.
What to Look For When Buying
GPS enabled — non-negotiable. A PLB without GPS can still locate you via Doppler positioning but it is significantly slower and less precise. All modern PLBs include GPS as standard — if you find one without it, walk away.
Buoyancy — a PLB that sinks in the water is useless. Look for a PLB that is inherently buoyant or comes with a flotation collar. If you end up in the water your PLB needs to float antenna-up to transmit properly.
Size and weight — the best PLB is the one you actually have with you. A compact, lightweight unit that clips to your lifejacket means you will always have it. A bulky unit that stays in the grab bag because it is inconvenient is no use if you go overboard alone.
Battery life — PLBs transmit for a minimum of 24 hours. Check the standby battery expiry date on the unit — typically 5 to 7 years. Note the date and replace before it expires.
AIS capability — newer PLBs include AIS which alerts nearby vessels within VHF range immediately, potentially cutting rescue time significantly before coastguard even arrives. AIS is the norm commercially and will be with all Yachts. i have been on a vessel at night, on watch and a vessel was not too far away from being hit because their Starboard light was broken and there was no AIS, double no!
Our Top Picks — Available on Amazon
1. Ocean Signal rescueME PLB1 — Our Top Pick
The world’s most compact PLB — genuinely small enough to fit in your palm. Engineered and manufactured in the UK. GPS enabled, waterproof to 15 metres, 7 year battery standby life, and operates from -20°C to +55°C which matters if you are working in the North Sea in winter. The spring loaded activation button prevents accidental activation. Simple, reliable, trusted.
2. ACR ResQLink AIS PLB-450 — Best with AIS
This is the most capable PLB on the market right now. It combines global satellite rescue with AIS — meaning nearby vessels within a 5 mile radius receive your distress signal immediately as well as the coastguard. ACR has been making rescue beacons since 1956 and their kit is used by NASA and the US Military. The Return Link Service confirms your distress signal has been received — genuine peace of mind when you need it most.
3. McMurdo FastFind 220 — Best Budget Option
Straightforward, proven, and the most accessible price point in this category. One button activation, GPS and Galileo GNSS positioning, 121.5MHz homing signal, and a flashing SOS LED for visual location. Heavier than the Ocean Signal at 340g and not inherently buoyant so use with a flotation collar for marine use. Does exactly what it says on the tin — there is a verified account of this unit saving a life during a stroke emergency at sea. Simple, Reliable.
FAQs
How do I activate a PLB?
Most PLBs require you to extend the antenna, remove a cover or guard, and press the activation button. Each model is slightly different — read the instructions before you need it. Practice the sequence without actually activating it. admittedly, I have only practiced at training centres and on commercial vessels.
Do I need a PLB if I already have an EPIRB?
They serve different purposes. An EPIRB stays with the vessel. A PLB stays with you. If you go overboard and the vessel drifts away from you, the EPIRB goes with the vessel — not with you. For offshore work, having both is the sensible answer.
Are there false activations with PLBs?
Accidental activations do happen — usually caused by water ingress triggering the device or incorrect handling. All PLBs have a self-test mode for testing without transmitting a real distress signal. A false activation is a criminal offence in the UK and wastes coastguard resources. Store your PLB correctly and use the self-test function rather than accidentally activating it.
Can I use a UK registered PLB abroad?
Yes. PLBs work globally. When you register yours, provide emergency contact details of someone who will know your location — this helps rescue authorities confirm a genuine distress and speeds up response.
The information in this article is for general guidance. Always verify current registration requirements at beaconregistration.admiralty.co.uk and refer to MCA guidance at gov.uk/mca.
