rescueME PLB3 AIS Personal Locator Beacon
One PLB. For land, sea and air.

Ocean Signal rescueME PLB3 is an AIS Personal Locator Beacon combining 406 MHz satellite distress alerts through Cospas-Sarsat with local AIS broadcasts. It can activate through a correctly fitted compatible inflatable lifejacket, or be carried independently and activated manually. No subscription or mobile signal is required.
New to emergency beacons? Read the complete Personal Locator Beacon guide.
Who is the PLB3 for?
From days afloat to remote trails and flying, carry a dedicated way to call for help in a life-threatening emergency.
Combined satellite + AIS alerting
Satellite rescue alerting. Local AIS visibility.
Satellite alerts reach rescue authorities through Cospas-Sarsat. AIS (Automatic Identification System) broadcasts your position to nearby vessels with compatible receiving equipment, within radio range.
- 406 MHz + AIS
Global distress alerting and local position broadcasts. - Return Link Service (RLS) acknowledgement confirms that your distress alert was received and your location detected.
- Lifejacket integration
Semi-automatic activation with a correctly fitted, armed compatible lifejacket.
RLS does not confirm rescue dispatch. Availability depends on country configuration. AIS reception and alarms depend on range and equipment; PLB3 does not transmit DSC alerts.
Make your lifejacket part of your rescue plan
For automatic activation
Fit PLB3 inside a compatible inflatable lifejacket. Once correctly fitted, packed and armed, inflation deploys the antenna and activates the beacon. Ocean Signal calls this semi-automatic activation.
Carriage matters. PLB3 needs its flotation pouch to float. Operate it clear of the water, with the antenna upright and a clear view of the sky. It is not designed to operate floating unattended. Check the PLB3 flotation pouch.
Lifejacket compatibility Ā· Watch the installation video Ā· Read the fitting instructions
Take it anywhere. Just like a PLB should.
For manual activation too
A lifejacket is not needed to use PLB3. Secure it within reach using the supplied belt/webbing clip and lanyard. Manually activate it in a life-threatening emergency, on land or on the water.
The antenna releases quickly: keep it at least 30 cm from your eyes and face. If removing the activation slide does not start PLB3, use the ON key as described in the manual. Read the full operating instructions before use.
See manual activation in action
A little blue light. Meaningful reassurance.
Know your call for help got through.
When PLB3 receives the return confirmation from the satellite rescue system, it flashes blue in the RLS acknowledgement pattern. This confirms that your distress alert was received and your location detected.

That is Return Link Service (RLS): a confirmation sent back to your beacon, so you know your emergency signal got through.
RLS does not confirm rescue dispatch or an arrival time. Availability depends on country configuration. PLB3 uses several indicator sequences; read the manual to recognise the RLS acknowledgement.
Real-world PLB3 rescues
Proven when it matters most.
From solo sailing to catamaran racing. Real people. Real rescue accounts.
Overboard while sailing alone.
When Peter Thomas went overboard, his lifejacket inflated and his PLB3 antenna deployed. A passing powerboat recovered him, followed by the RNLI and other responding boats.
āThe casualtyās life was almost certainly saved by the combination of his PLB and lifejacketā
RNLI Exmouth, quoted in Peterās account. An individual incident, not a guaranteed outcome.
Catamaran racing
Capsized. Separated. Both carried a PLB3.
After their racing catamaran capsized, Theodore Gijsbers and Maud Van Toorenburg became separated in rough water and were unable to climb back aboard. Each activated their own rescueME PLB3. Ocean Signal reports that a participating catamaran responded after receiving the AIS MOB alert and helped rescue them.

Support beyond the rescue
What is the 406 Survivor Club?
Use it in a lifesaving emergency. Apply for a free replacement.
The 406 Survivor Club is Ocean Signalās beacon replacement programme for PLB and EPIRB owners. If your PLB3 helps in a genuine lifesaving rescue, share your story and apply to have your used beacon replaced free of charge.
Replacement is subject to programme eligibility and verification. Contact Ocean Signal for the submission and beacon-return requirements.
Independent perspectives
What the reviewers say
Independent PLB3 reviews and marine coverage. Read the verdicts, including the fitting considerations and full context.
Practical Boat Owner
5/5 Ā· Recommended
āa huge and welcome step forward in personal safety, especially offshore or at night.ā
Praises the combined beacon; recommends learning the indicator sequences.
Yachting World
4/5 overall
āhaving one device absolutely makes sense.ā
Values simpler fleet maintenance; flags bulk and a tight lifejacket fit.
Read all publication reviews & coverage
Reviews, buying guides and announcements are labelled below. Scores belong to the publications. The Yachting World review and Yachting Monthly guide share a byline.
Safety equipment buying guide
Yachting Monthly
Featured safety equipment
āideal for keeping devices to a minimum especially on fully crewed or commercial vesselsā
Highlights combining both alerting systems in one device. Its buying advice also notes the premium price and potential fit limitations in some lifejackets.
Comparative review Ā· membership required
Attainable Adventure Cruising
John Harries compares PLB3 with MOB1, examining the balance between satellite capability, local alerting, size and ownership. The introduction cautions against choosing on feature count alone.
Equipment feature
Powerboat & RIB
Explores PLB3 alongside the GlobalFix V5 EPIRB, explaining the combination of local AIS and satellite distress signalling and the option of lifejacket installation.
Award reporting
SAIL Magazine
Reports PLB3ās overall win at the 2022 DAME Design Awards, covering the combination of satellite, AIS and locating technologies recognised by the jury.
Product launch news
Marine Industry News
Covers the UK and European launch of the DAME-winning PLB3 and explains its satellite, AIS and lifejacket-integration features.
Distributor product announcement
The Skipper
Introduces CH Marineās PLB3 offering, with an overview of the beaconās combined alerting systems, lifejacket use and NFC ownership checks.
Updated buying guide
More from Yachting World
The personal beacon guide includes PLB3 in its combined AIS and PLB selection, with reasons to buy and fitting considerations alongside other beacon types.
Ready for the journey ahead
No subscription fees. Ever.
Dedicated emergency signalling without a monthly airtime plan.
No airtime plan
406 MHz and AIS distress signalling work independently of your phone and mobile coverage.
24+ hours
Operating duration of over 24 hours at ā20°C, once activated.
Check before you go
Use prescribed self-tests and NFC app access to review battery usage and test history.
Battery replacement and servicing remain part of ownership. Follow the expiry label and the manualās test schedule.
See the NFC app and ownership checks

Know your beacon before you need it.
A compatible NFC phone and the free Ocean Signal app let you read battery usage and test results. NFC reads use phone power.
The app is not live tracking, two-way messaging or remote activation. Follow the manualās test schedule.
From alert to location
How the rescueME PLB3 helps rescuers find you
Satellite alerting, local AIS and close-range locating signals each play a different role.

01 Ā· LOCATE
Establish your position.
GNSS provides location data for the beaconās distress transmissions.
02 Ā· ALERT
Reach both networks.
406 MHz alerts search and rescue via Cospas-Sarsat. AIS broadcasts to compatible vessels within radio range.
03 Ā· HOME IN
Help responders locate you.
121.5 MHz homing plus white and infrared strobes help equipped rescuers find the beacon.
Reception, response and rescue timing depend on conditions and equipment. Explore how the satellite rescue system works.
Choose your personal beacon
PLB3, PLB1 or MOB2?
Choose PLB3 for satellite distress alerting plus local AIS, RLS and lifejacket integration. Choose PLB1 when compact satellite alerting is your priority. Choose MOB2 for local crew recovery with AIS and DSC, without 406 MHz satellite alerting.
Scroll the table sideways on smaller screens.
| Decision point | rescueME PLB3 | rescueME PLB1 | rescueME MOB2 |
|---|---|---|---|
| 406 MHz satellite distress alert | Yes | Yes | No |
| Local AIS position broadcast | Yes | No | Yes |
| DSC alerting | No | No | Yes |
| Return Link Service | RLS capable; configuration dependent | No | No |
| Activation approach | Manual or semi-automatic with compatible lifejacket | Manual | Automatic with correctly fitted compatible lifejacket; manual activation available |
| Primary reason to choose | Satellite + local AIS in one personal beacon | Compact dedicated satellite alerting | Local crew recovery with AIS + DSC |
Explore PLB1 or MOB2, or read our personal locator beacon guide.
MOB2 availability and DSC operation are country-dependent. Check the local product page and compatibility with your receiving equipment.

Equipping two people?
A PLB3 for each of you.
The Sailing Safety Kit brings together two PLB3 beacons, an Ocean Signal grab bag and signalling accessories. Keep each beacon secured to its wearer.
Ocean Signal customer feedback
Trusted by Ocean Signal customers
Read customer feedback from Ocean Signalās review feed.
Ready for the journey ahead
Simple to own. Important to prepare.
Choose the correct country coding, register your beacon and learn the operating procedure before your first trip.
Choose your country coding
Confirm the correct country coding and RLS configuration for your registration route before ordering. Beacon programming and owner registration are separate steps.
Register before you go
Register the beaconās unique identity with the authority for its country coding. Keep your contact details, emergency contacts and trip information current.
Know it before you need it
Read the PLB3 manual and learn manual activation, fitting and indicator sequences. Use only the prescribed self-tests, secure the lanyard and check the battery replacement date.
Make an informed choice
Your rescueME PLB3 questions, answered
Choosing your beacon
Buying and getting ready
Registration, testing & battery replacement
Register before your first trip.
Confirm country coding and RLS configuration for your registration route. Register with the appropriate authority and keep emergency contacts current. Ocean Signal warranty registration is separate.
Read the fitting and operating instructions and use only the prescribed self-tests. Arrange authorised battery replacement after emergency use or when required by the expiry label or test result.
Registration guide Ā· PLB3 manual (PDF) Ā· Warranty & returns
Specifications & whatās in the box
| Operating duration | Over 24 hours at ā20°C |
|---|---|
| Battery replacement interval | 6 years from manufacture or 5 years after entering service. Follow the expiry label and service instructions. |
| Size | 200 Ć 36 Ć 22 mm |
| Weight | 190 g |
| Operating temperature | ā20°C to +55°C |
| Water immersion rating | Over 10 m for over 60 minutes |
| Buoyancy | Requires flotation pouch; not a floating operating position |

Included with PLB3
- rescueME PLB3 beacon
- Belt/webbing attachment bracket
- Oral tube attachment bracket
- Activation tape and armed-slider cover
- Antenna rewind tool and attachment lanyard
- Product documentation and Quick Start Guide
Check your market package for regional additions. View the flotation pouch.
Using PLB3
For adventures beyond mobile coverage.
Satellite distress alerting, local AIS and lifejacket integration, in one personal beacon.





































