The best AIS personal locator beacon depends on where you need help to find you. For a man-overboard emergency near a vessel, the Ocean Signal rescueME MOB1 sends AIS alerts and includes DSC. The ACR RESQLINK AIS combines AIS with a satellite distress signal, while the ACR ResQLink View RLS and PLB425 and the McMurdo FastFind 220 are satellite-focused options. Compare how each device sends an alert before choosing: AIS requires nearby vessels with compatible receivers, while satellite PLBs contact search-and-rescue authorities.
| Product | Best suited for | Alert approach |
|---|---|---|
| Ocean Signal rescueME MOB1 | Man-overboard response near equipped boats | AIS and DSC |
| ACR RESQLINK AIS | Boaters seeking AIS and satellite distress signaling | AIS and satellite SOS |
| ACR ResQLink View RLS | Outdoor users who want confirmation of signal receipt | Satellite SOS with RLS |
| ACR ResQLink View PLB425 | Boaters and outdoor users wanting a buoyant PLB | Satellite SOS |
| McMurdo FastFind 220 | U.S. users who need a PLB programmed for U.S. registration | Satellite PLB |
Ocean Signal rescueME MOB1
Best for: Boaters who want a compact man-overboard beacon designed to alert nearby vessels. The MOB1 transmits an AIS emergency alert to AIS receivers and chart plotters, sharing the activated device’s location with the boat and assisting parties. It also includes an integrated DSC transmitter.
The product listing identifies automatic activation, a 66-channel GPS receiver, a seven-year battery life, and 24 hours of operation. These features make it a focused choice for crew safety and quick location reporting in a man-overboard event.
Limitation: AIS alerts depend on receiving equipment in the surrounding area. Choose a satellite PLB instead if you need a distress alert routed to search-and-rescue authorities rather than nearby AIS-equipped vessels.
ACR RESQLINK AIS PLB-450
Best for: Boaters who want both local AIS visibility and a satellite distress option in one beacon. Its AIS signal can be received by vessels with AIS receivers or plotters within a stated five-mile radius, subject to conditions. The product also lists RLS, which confirms to the user that Search and Rescue received the distress signal.
NFC lets users access beacon data on a mobile device, including battery life, activation time, test history, and GNSS test details. That makes it a better fit than an AIS-only device for buyers who want status information and more than one signaling path.
Limitation: The stated AIS range is conditional, and reception depends on nearby equipment. Do not treat its AIS function as a replacement for understanding the beacon’s satellite SOS operation.
ACR ResQLink View RLS PLB
Best for: Outdoor users who want a satellite SOS beacon with confirmation that Search and Rescue received the distress signal. Its RLS feature returns that confirmation to the beacon owner. A digital display and infrared strobe are listed for emergency visibility and signal detection.
The listed specifications include no subscription requirement, a five-year battery life, and more than 28 hours of operational life. It is a useful comparison for buyers who prioritize satellite rescue signaling and receipt confirmation over an AIS alert for nearby boats.
Limitation: The listed features do not identify AIS transmission. Choose another model if alerting nearby AIS-equipped vessels is a core requirement.
ACR ResQLink View PLB425
Best for: Boaters, hikers, campers, and other outdoor users who want a buoyant GPS personal locator beacon. Once activated, it sends a GPS-positioned distress signal to Search and Rescue worldwide using a 406 MHz signal, with a 121.5 MHz homing signal. The listing states that no subscription is required.
Its small, rugged design and included clips, straps, and lanyards support different carry setups. Optional 406Link testing can send pre-canned non-emergency self-test and GPS-test messages to contacts by text or email.
Limitation: The 406Link messaging feature is optional and requires a testing subscription. The listed features do not include AIS alerts to nearby vessels.
McMurdo FastFind 220 PLB
Best for: Buyers who need a personal locator beacon programmed for registration under the U.S. country code. The product can function worldwide, but its initial emergency point of contact is the U.S. Search and Rescue authorities associated with its registration.
Registration helps rescuers identify the beacon owner and use emergency contacts or trip information. The listing notes that registration is required by law in most countries, so buyers should confirm that the device’s programming matches their intended registration country.
Limitation: This listing is specifically programmed for the United States. Buyers registering in another country should select a version programmed for that country.
Buying Guide: How to Choose an AIS or Satellite PLB
Do you need AIS, satellite SOS, or both?
AIS is intended to make a person’s location visible to nearby vessels with compatible AIS receivers or chart plotters. It is particularly relevant for man-overboard response around equipped boats. A satellite PLB instead sends an emergency signal to search-and-rescue authorities. The ACR RESQLINK AIS lists both capabilities; the rescueME MOB1 is focused on AIS and DSC.
Will the beacon be used on a boat or on land?
For crew members who need a dedicated man-overboard device, compare AIS coverage, activation details, GPS, and DSC. For hiking, camping, or remote travel, a satellite PLB may be the more relevant type. A buoyant design, such as the listed ResQLink View PLB425, can also matter for water use.
What do RLS, battery life, and registration mean?
RLS confirms to the beacon owner that Search and Rescue received the distress signal; it is not the same as confirmation that rescuers have reached the person. Compare stated battery and operating life, and follow the manufacturer’s instructions for testing and service. Register the beacon as required and make sure its programming matches the country where it will be registered.
Frequently Asked Questions
Is an AIS beacon the same as a satellite PLB?
No. AIS alerts nearby vessels with compatible equipment. A satellite PLB sends a distress signal to search-and-rescue authorities. Some products combine these approaches.
Does an AIS personal beacon work without nearby boats?
AIS alerts need receiving equipment in range. If no suitably equipped vessel is nearby, an AIS-only alert may not reach anyone able to respond.
Does a personal locator beacon require a subscription?
Requirements vary by product and feature. The ResQLink View RLS and PLB425 listings state that no subscription is required for their main distress signaling. The PLB425’s optional 406Link testing feature does require a subscription.
Why should I register a PLB?
Registration helps authorities connect an activated beacon to its owner and emergency contacts. It can also provide trip information that may assist a search-and-rescue response.
What is RLS on a PLB?
Return Link Service sends confirmation to the beacon owner that Search and Rescue received the distress signal. It does not indicate that a rescue team has arrived.