rescueME PLB1 Personal Locator Beacon

They solve the same emergency problem in different ways. Ordinary mobile emergency calls still depend on available terrestrial coverage. A compatible iPhone can support interactive satellite emergency messaging, but it requires a charged, working phone, a supported country and model, onscreen interaction and following directions to maintain a satellite connection. The PLB1 is a dedicated, rugged 406 MHz distress beacon with reserved emergency battery power and 121.5 MHz homing. When practical, carry both rather than treating either as a universal replacement. Read the full PLB1 versus iPhone Emergency SOS comparison.

A PLB is a dedicated one-way distress beacon. The PLB1 sends a 406 MHz alert through Cospas-Sarsat and provides 121.5 MHz homing, with no monthly subscription. Satellite communicators offer features such as two-way messages, check-ins and tracking; service plans and SOS terms depend on the device and provider. Compare PLBs and satellite communicators.

Iridium is a commercial communications network used by compatible satellite phones and messengers. Cospas-Sarsat is an international search-and-rescue system for 406 MHz distress beacons. PLB1 uses Cospas-Sarsat, provides no routine two-way communication and needs no distress-alerting subscription.

No. iPhone Emergency SOS via satellite does not transmit a 406 MHz Cospas-Sarsat beacon alert. PLB1 uses Cospas-Sarsat and adds 121.5 MHz homing for equipped rescue teams. Phone availability and features depend on the model, software and country; see the PLB1 versus iPhone guide.

For many remote users, yes. A phone is valuable for calls, maps and everyday communication, while a satellite communicator can provide off-grid messaging, tracking and check-ins. A PLB adds a dedicated emergency distress path with long-life reserve power and no distress-alerting subscription. The right combination depends on your activity, risk, local rules and need for routine communication.

A PLB1 is registered for personal use, carried by an individual and manually activated. An EPIRB is designed around vessel-level maritime distress alerting; depending on its model and bracket, it may provide float-free release and automatic activation, and it normally has a longer required transmission duration. A PLB can complement an EPIRB but does not automatically replace required vessel equipment. See the PLB versus EPIRB explanation.

Not automatically. An ELT is aircraft emergency equipment and may be installed and crash-activated, while the PLB1 is a manually activated personal survival beacon carried by a pilot or passenger. A PLB can add a valuable independent rescue-alerting layer, but pilots must check the current ELT, PLB, coding and carriage requirements for the aircraft’s registration, route and operation. See the PLB, EPIRB and ELT guide.

Choose PLB1 when minimum size and straightforward 406 MHz satellite distress alerting are the priorities. The rescueME PLB3 adds nearby-vessel AIS alerting, Return Link Service acknowledgement, NFC status access, an infrared strobe and compatible-lifejacket integration. PLB3 is the more feature-rich marine option when those additional alert and confirmation paths matter.

Yes. When you buy directly from Ocean Signal, country programming is included at no extra charge. Confirm the required coding when ordering. You must still register the programmed beacon with the appropriate national authority before use.

Register the beacon with the official 406 MHz authority for its country coding—normally your country of residence or, where applicable, the country of vessel registration. Registration is free in many markets. Official starting points: United Kingdom, United States, Canada, Australia, New Zealand and France. For other countries, use Ocean Signal’s country registration guide or contact the national authority before use.

The PLB1’s 406 MHz message contains a unique 15-digit HEX ID. Registration connects that identifier with owner, emergency-contact and activity information, helping rescue authorities verify the alert and understand who or what they may be looking for. Update the record whenever your contact, vessel, aircraft or emergency information changes.

It contains the number 0 (zero), never the letter O. A 15-character HEX ID uses only digits 0–9 and letters A–F. Copy the identifier exactly when registering your beacon.

A correctly coded and registered PLB1 can be activated worldwide through Cospas-Sarsat. Keep emergency contacts informed of your travel plans and check the destination’s rules for beacon registration, country coding, maritime or aviation recognition and required safety equipment before relying on it.

Generally yes, subject to your airline’s rules. The installed PLB1 battery contains 1.65 g of lithium. Prefer hand luggage, keep the beacon switched off and protect it against damage and accidental activation. If your airline permits checked carriage, the same protections are essential. Check with the airline before travelling and have the PLB1 battery safety data sheet (PDF) available.

Yes. The PLB1 does not depend on a phone, mobile network or Wi-Fi. When activated, it sends a 406 MHz distress alert and available GPS position through the international Cospas-Sarsat satellite system.

No. There are no monthly or annual subscription charges for the PLB1’s 406 MHz emergency distress function. The beacon must still be registered correctly, maintained and have its battery replaced when required.

Ocean Signal offers a free replacement beacon to PLB and EPIRB owners after a qualifying lifesaving rescue story is approved and shared. Submit your account and supporting images, and follow the team’s eligibility and return instructions. Replacement is subject to programme approval. See the Survivor Club and submission route.

The PLB1 has a two-year limited warranty. Register the product with Ocean Signal within 90 days of purchase to add three years, subject to the current terms. This warranty registration is separate from registering your beacon with the rescue authority. Keep your receipt and review the Ocean Signal warranty policy.

Activation starts the distress alerting process. Cospas-Sarsat satellites and ground stations route the beacon’s identity and available GPS position to rescue coordination authorities. Equipped rescue teams can use 121.5 MHz homing to close in; the visible strobe adds a visual reference. The PLB1 does not receive acknowledgement or a rescue arrival time.

Cospas-Sarsat can determine a beacon’s location from its radio transmission. The PLB1 also sends an encoded GPS position when it has a fix; Ocean Signal quotes typical GPS-position accuracy within 100 metres. These are complementary location methods, while 121.5 MHz homing helps equipped rescue teams locate the beacon nearby. Sky visibility and obstructions affect GPS acquisition, so follow the operating-position guidance in the manual.

The standard PLB1 does not float without a flotation pouch. The optional PLB1 Floatation Pouch provides buoyancy, but it does not hold the beacon in its operating position. Tether it securely and keep the beacon clear of the water during activation.

Ocean Signal supplies these regional versions with a permanently attached flotation pouch to meet local buoyancy requirements. The pouch helps the beacon float but does not keep it upright for operation. For changes to the attachment or a land-use setup, ask Ocean Signal about your exact regional version before making alterations.

The mounting clip can keep the PLB1 accessible, but always follow the lifejacket manufacturer’s installation instructions and secure the beacon with its lanyard. If integrated inflatable-lifejacket activation is essential, compare the rescueME PLB3.

The PLB1 is manually activated and should only be used in grave and imminent danger. Deploy the antenna and follow the instructions printed on the beacon and in the manual. If it is activated accidentally, deactivate it and contact the nearest Coast Guard or Rescue Coordination Centre promptly to report the false alert.

The PLB1 battery is replaceable by an Ocean Signal authorised battery replacement centre, not by the owner. Its replacement interval is seven years, with more than 24 hours of specified operation at −20°C. Replace it before the marked expiry date, after any emergency activation—even a brief one—or when the self-test shows amber/orange or a battery-replacement warning. Have it serviced before relying on it again.

The PLB1 provides beacon and GPS test functions. Follow the exact procedure, timing and permitted test frequency in the current PLB1 user manual, because every test uses a small amount of battery capacity and GPS tests are limited.

A single green flash followed by another after a pause is the same status result shown twice. Amber means the battery has accumulated use or exceeded its test allowance; the number of flashes in each group indicates the usage band. Have the battery replaced before relying on the beacon again. This describes the beacon self-test: GPS-test flashes have a different meaning. Use the tables in the PLB1 manual (PDF), sections 4.1 and 4.2.

No. PLB1 provides one-way distress alerting, with no routine tracking, check-ins, two-way messaging or RLS acknowledgement. PLB3 adds RLS to confirm receipt and location of the distress alert; that does not mean rescue has been dispatched. Choose a suitable satellite communicator if you also need routine off-grid messages.

Prevent false alerts by arranging permanent deactivation and battery removal before disposal. Tell the beacon registration authority it is no longer in service, and use appropriate local battery and electronics recycling. Contact an authorised service centre for instructions: the PLB1 is not user-serviceable, and opening its case invalidates the warranty.