REASONS TO BUY
Reasonable initial purchase price
No paid subscription
Uses proven global network
Compact
REASONS TO AVOID
No non-emergency messaging
Ocean Signal rescueME PLB1 Review
This device provides a compact and affordable “help me” button in your pocket
There is a spring-loaded cover that helps to prevent accidental activation of the PLB1. Here it is shown open.
Credit: Jediah Porter
RELATED: Best Satellite Messengers of 2024
Our Verdict
The Ocean Signal rescueME, with its great value and very compact stature, earns its place as one of our coveted award winners. It does nothing more than summon help in an emergency, but it does that well, using a proven network of satellites and an established dispatch system. In doing so, it achieves the Best Value for SOS-only communication. It is half the size of its closest competitor, and when considering subscription costs and product expiration, it is more than half the cost of any product with additional features. Purchase and carry the rescueME PLB1 for an emergency message in a life-threatening situation, and you will not be disappointed. If you are looking for the opportunity to send some reassurance, or receive correspondence, this is not the tool for you. Get the scoop on how it stands up to the competition in our review of the best satellite messengers.
Editor's Note: This review was updated on January 19, 2023, after checking all statements for accuracy and adding more information on other products we recommend.
Compare to Similar Products
 This Product
Ocean Signal rescueME PLB1 | |||||
|---|---|---|---|---|---|
| Awards |  Great Value for SOS Only |  Best Value for Messaging | Occasional Activation Bang for the Buck |  Best for Standalone Use | |
| Price | $369.95 at REI Compare at 2 sellers | $238.99 at Amazon Compare at 4 sellers | $199.95 at REI Compare at 2 sellers | $149.00 at Amazon Compare at 3 sellers | $249.95 at REI Compare at 3 sellers |
Overall Score  |
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| Star Rating | |||||
| Bottom Line | A small, satellite-linked emergency communicator that is exactly what you need and nothing more | There are devices that have more features but those features are unnecessary and come at the cost of more useful function | A compact, full service satellite messenger that has all you need, and is close to all you would want | This is a smooth, comprehensive two-way communicator that relies on a proven satellite network and brings innovations that raise the bar | If you want two-way texting that doesn't rely on a smartphone and tend to travel in the Americas and Europe, this one's is for you |
| Rating Categories | Ocean Signal rescue... | Garmin inReach Mess... | ACR Bivy Stick | ZOLEO Satellite Com... | SPOT X |
| SOS/Emergency Messaging (30%) | |||||
| Non-Emergency Messaging (25%) | |||||
| Signal Coverage (20%) | |||||
| Ease of Use (15%) | |||||
| Portability (10%) | |||||
| Specs | Ocean Signal rescue... | Garmin inReach Mess... | ACR Bivy Stick | ZOLEO Satellite Com... | SPOT X |
| 2-way Messaging? | No | Yes | Yes | Yes | Yes |
| 2-way Messaging Available via Cellular/Wifi? | No | Yes | No | Yes | No |
| Custom Messaging Viewable and Composable on Device? | No | Yes | No | No | Yes |
| Passive Tracking (turn on and forget about it - viewers at home can watch your progress on the web) | No | Yes | Yes | No | Yes |
| Weight w/ Batteries | 4.0 oz | 4.0 oz | 3.6 oz | 5.3 oz | 6.8 oz |
| Battery Life | 24 hours | Up to 28 days with a message or location sent every 10 minutes with full sky view | Up to 120 hours | 200+ hours when checking messages every 12 minutes | 240 hours |
| Waterproof Rating | No Formal Rating. Likely exceeds rating system. Claimed "Up to 15 meters" | IPX7 (No dust rating. Rain, splashing, and accidental submersion up to 30 minutes) | IP67 (protection from harmful dust. Rain, splashing, and accidental submersion up to 30 minutes) | IP68 (protection from harmful dust. Rain, splashing, and accidental submersion at least 30 minutes) | IPX7 (No dust rating. Rain, splashing, and accidental submersion up to 30 minutes) |
| Pairs with Smartphone? | No | Yes | Yes | Yes | Yes |
| Requires recipient to use a special app for two-way communications? | N/A | No | Yes | Yes | No |
| On Device Functions (if you lose or disable your smartphone) | All. | All, but very slow to text | SOS, check-in, tracking. All texting requires smartphone. | SOS, check-in. All texting requires smartphone | All.Texting is slightly faster on smartphone. |
| Satellite Network | COSPAS/SARSAT | Iridium | Iridium | Iridium | Globalstar |
| Dispatch service | COSPAS/SARSAT | Garmin Response Team | Global Rescue | GEOS | Focus Point International |
| Dimensions | 3.0" x 2.0" x 1.3" | 3.1" x 2.5" x 0.9" | 1.9" x .9" x 4.5" | 3.5" x 2.6" x 1.0" | 6.5" x 2.9" x 0.9" |
| Volume | 6.8 CU IN | 6.9 CU IN | 7.7 CU IN | 9.1 CU IN | 17 CU IN |
Show full specification details ▼Hide full specification details ▲
Our Analysis and Test Results
Ocean Signal makes what is likely the world's smallest satellite-linked personal locator beacon. Employing the proven COSPAS/SARSAT international SAR technology and protocol, the PLB1's emergency messaging has a long track record. It is affordable, requires no paid subscription, and is half the bulk of its next closest competitor. For these reasons, it earns one of our Best Buy awards. You will choose this if you want ultra simple emergency SOS function or if you want redundancy with another device you might already have in the group. Smartphones are starting to add built-in emergency SOS functionality that, at first glance, seems the same as that provided by the PLB1. No smartphone, yet, offers Satellite SOS function that covers as much of the earth as the PLB1 does.
Performance Comparison
The PLB1, with stow-away antenna deployed and ready. In an emergency, you will set the device out like this and push the “SOS” button.
Credit: Jediah Porter
SOS/Emergency Messaging
The singular purpose of the rescueME is to send an emergency signal. To do so, it uses a proven — and free — global service. You buy the device, and the device taps into the COSPAS/SARSAT search and rescue satellite network, which covers the entire globe. If your device can “see” enough of the sky to connect to satellites, you can press the SOS button anywhere on Earth and expect the device to get a signal out.
That signal, containing identity and location data, will go to a satellite, back to a ground station, and eventually to the national agency with which you registered your device. In the US, you register with the National Oceanic and Atmospheric Administration (NOAA). (Instructions for free US registration are included with the PLB1.) The agency will then work to secure the most effective local resources, given sociopolitical and economic realities, terrain, and weather conditions. Up to the point that local resources are activated, the service is free. Local SAR resources and their costs vary significantly around the world.
Non-Emergency Messaging
There is currently no non-emergency messaging option with the rescueME PLB1. This is a situation common to all devices that use the COSPAS/SARSAT network and dispatch system. For non-emergency messaging, you must choose a different device and purchase a subscription that costs way more than the free registration of the PLB1.
Ocean Signal's parent company ACR-Artex offers a service that provides very rudimentary non-emergency messaging from devices like, and including, the rescueME PLB1. That service, called 406Link, is explained best in ACR's marketing materials. With this service and a small fee, owners of the PLB1 are offered a very significant perk. 406Link allows for the sending of a few very basic “I'm OK” type messages. This non-emergency messaging function we cite is definitely a sort of “off label” use of the PLB1. It consumes non-rechargeable battery power and leverages a sort of “test” procedure option in the COSPAS/SARSAT satellite communication protocol. This service has come and gone from the ACR menu. Proceed with caution.
The various extra parts that come with the PLB1 are for carrying and securement. We tend to carry the device, alone, in a ziplock bag inside our first aid/emergency kit.
Credit: Jediah Porter
Signal Coverage
The COSPAS/SARSAT system covers the entire world. Of course, as noted above, all satellite communications are vulnerable to terrain, forests or buildings, and electronic interference. The PLB1 is just as vulnerable to this as any other device. With a two-way communication device, you learn, while sending and receiving routine messages, what sorts of terrain will have a good signal. In the unlikely event that you need to send an emergency message, you can use that knowledge. With the PLB1, you won't have that opportunity to learn. Just realize that it will only work with a pretty wide view of the sky.
Coverage for all COSPAS/SARSAT devices is precisely the same as it is for this one. The Iridium network employed by the others is worldwide as well, but it uses different satellites. The coverage of the Iridium Network will interact with local terrain differently than that of the COSPAS/SARSAT system. The GlobalStar network used by still others is not worldwide but seems to cover much of the territory that most American adventurers visit.
Ease of Use
The rescueME PLB1 is easy to use. Set-up requires you fill out an online form and mount a mailed sticker. You can make some changes to your registration if needed, but you are then good to go for two years. You renew, for free, every two years. If you have a life-threatening emergency, there are basic activation instructions printed right on the device housing.
The Ocean Signal (right) and ACR ResQLink (left) both have instructions printed directly on the device.
Credit: Jediah Porter
Portability
Th PLB1 is one of the most portable devices in our review. Weighing just 4 ounces with batteries and measuring a mere 3 x 2 x 1.3 inches, this is about as light and compact as you can get.
Our testers find that the tiny stature of the PLB1, in addition to its budget price point, encourages carriage of emergency satellite communications on every adventure. Even in the most mundane of positions and trips, the PLB1 can be tucked into a pants pocket or purse.
Should You Buy the Ocean Signal rescueME PLB1?
This is a compact, inexpensive way to have a “y'all come” button in your wilderness kit. It does nothing more than activate SAR in a dire emergency. If that is all you want, get this thing. Some of our testers are carrying this device as a back up to their primary, two-way satellite communication product. In the most remote, most serious settings, everyone's peace of mind is improved with this sort of redundancy.
The Ocean Signal is much more compact than many other devices.
Credit: Jediah Porter
What Other Personal Locator Beacons Should You Consider?
The ACR ResQLink View does the same thing as the rescueME but is a little larger. The iPhone Satellite Messaging has a built in function that simulates everything that the PLB1 does (in the USA and Canada, for now). Apple adds very basic non-emergency functionality as well. The iPhone Emergency SOS function is an especially appealing substitute for the PLB1 when the emergency-only function is carried as a back up to one's primary, two-way device. If the idea of having a back up to your Garmin inReach Messenger or SPOT X on super remote trips is appealing, but your phone and/or carrier do not yet support emergency satellite-linked function, the PLB1 is a great, relatively inexpensive and super compact solution to the redundancy goal. The SPOT Gen4 adds just a little more non-emergency messaging function.
—
Jediah Porter
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