TL;DR Summary for Skippers:

• The Golden Rule: The best beacon is the one you never use. “One hand for the ship, one hand for yourself.” Don’t fall in.
• The Tether Warning: Standard tethers can drown you if towed at 6 knots. Upgrade to a release system like the TeamO BackTow.
• The Charter Blindspot: An AIS beacon is useless if the boat you fall off has its AIS receiver turned off. (a massive problem on charter yachts).
• How AIS Beacons Work: You cannot program an AIS target. All personal AIS beacons transmit a hardcoded 972 MMSI. The programmable MMSI is only for triggering your boat’s DSC VHF alarm.
• Mixing Experience Levels: If you are an expert skipper sailing with a novice, mix your tech. Give the novice the AIS-MOB (with DSC), and you wear the PLB3. Read below to find out exactly why.

The marine electronics industry loves to sell us peace of mind in little plastic boxes. We strap them to our lifejackets, check the blinking green battery lights, and tell ourselves that if everything goes wrong, pushing a button will summon a helicopter. (If you are within range!)

But out on a rolling sea in the pitch black, things are rarely that simple.

For years running Swiss Alpine Adventure, we preached the “holy trinity” of off-piste skiing: a transceiver, shovel, and probe. It is a no-brainer because every skier knows the mountain rescue helicopter will arrive too late. Your survival depends entirely on “companion rescue”—your friends finding you in minutes.

Yet, when we step onto a yacht, that logic vanishes. We happily drop thousands on chartplotters but hesitate over a personal beacon, assuming “institutional rescue” (the Coast Guard) will magically appear. But falling overboard at 2:00 AM is no different than getting buried in an avalanche. Your best chance of survival isn’t a helicopter; it’s the people you left behind on the boat. When purchasing our own devices, this is the thought that made me stop thinking and actually buy them.

If you walk into a chandlery today to buy a personal rescue beacon, you will be hit with an alphabet soup of acronyms: PLB, AIS-MOB, DSC, EPIRB. Buying the wrong one for your specific crew dynamic could mean you are screaming for help when no one is listening.

Whether you are preparing your own boat or packing your kit bag for a bareboat charter, here is the pragmatic guide to electronic lifesavers.

1. The Ultimate Rule: Don’t Lose Connection

Your Primary Life Support: Your brain and your grip. “One hand for the boat, one hand for yourself.” Keep your centre of gravity low, move carefully, and do not fall in.

Your Secondary Life Support: Your tether. Clipping on is frequently overlooked, but if things go wrong, it is what might keep you from becoming a search-and-rescue statistic.

• The Tether Problem: Standard tethers have a fatal flaw. If you fall over the side while the boat is doing 6 knots, being towed face down will drown you. We use the TeamO BackTow lifejacket, which you can release to tow you safely on your back, buying your crew critical time to stop the boat.

Autopilot Remotes: While marketing might suggest that some advanced autopilot remote control systems can turn the boat head-to-wind if you go overboard, these systems are rarely used on cruising boats—they are usually the territory of short-handed offshore racers. Even if you have one, the reality is that you are unlikely to be able to swim after a drifting, 45-foot yacht in a swell. If your physical connection to the boat is broken, you are in a desperate survival situation.

2. The Harsh Reality of Rescue Beacons

Rescue beacons are not magic bullets. They require you to actually have the device on your person, and in certain cases, you must be conscious to manually activate it.

To understand the stakes, look at two real-world extremes:

The Success (The Vendée Globe 2020): When Kevin Escoffier’s IMOCA 60 PRB snapped in half and sank in seconds in the Southern Ocean, his 406MHz EPIRB alerted Race Direction 8,000 miles away. His local AIS beacon helped fellow racer Jean Le Cam get to the right grid square. But in 5-meter waves and darkness, Le Cam still lost sight of him for hours. What ultimately allowed Le Cam to make the physical pickup? He saw the flashing light on Escoffier’s liferaft. Electronics bring the cavalry to the postcode; visual aids and seamanship finish the job.

The Tragedy (The ARC Transatlantic 2024): In December 2024, a highly experienced sailor went overboard from a Volvo 70 in 25-30 knots of wind mid-Atlantic. He was reportedly wearing an auto-inflating lifejacket equipped with a personal AIS beacon. Despite an immediate search by his crew and nearby yachts, he was never found.

Electronics give you a fighting chance, but they do not guarantee a rescue. Here is how to choose the right tool for the fight.

3. The Charter Boat Blindspot

Before you spend €400+ on an AIS-MOB, you need to understand that many charter boats do not have AIS receivers, or they are turned off!

When we were test-sailing our own yacht, All Winds, before buying her, the AIS was turned off and wasn’t even working properly when we switched it on. Over the years, we’ve even had to sneakily dive into the settings on bareboat charters to activate the AIS for night passages.

If you fall off a boat with no AIS receiver, your personal AIS beacon is transmitting to a blank screen. Your personal safety is only as good as the mother ship’s receiving equipment or another boat with AIS being close enough to help.

4. AIS-MOB Coding: How the Tech Actually Works

There is a massive misconception that you need to program your boat’s MMSI into an AIS beacon so your chartplotter recognises it. That is not how the technology works.

• AIS is Hardcoded: Every personal AIS-MOB device is hardcoded at the factory with an MMSI that begins with 972. You cannot change this. 972 is the international code for “Person in the water.” When a chartplotter receives a 972 signal, it overrides normal display rules, sounds an alarm, and drops a red circle with an ‘X’ on the screen. (Incidentally, if you see an MMSI number on the AIS beginning with “974”, it is an EPIRB).
• DSC is Programmable: Devices like the Ocean Signal MOB1 or MOB2 also feature DSC (Digital Selective Calling). This is where you program your mother ship’s MMSI. When activated, the device uses the DSC radio frequency to call your specific boat and trigger an ear-piercing alarm on your VHF radio to wake up the crew.
• The Second-Hand Warning (Class M Compliance): A new law enacted in January 2025 requires Personal AISs to be “Class M” compliant, which means they must have both a DSC sender and receiver. This plays a big role if you plan on buying a second-hand Personal AIS that may no longer meet the current legal standard.

5. The Big Misconception: The PLB3 Trade-off

If you have the budget, you might look at the top-tier Ocean Signal RescueME PLB3 and think: “It combines Satellite (406MHz) and AIS. I’ll buy that; it does everything!”

I recently spent time on the phone directly with Ocean Signal technical support, and here is the hard truth: The PLB3 does NOT have DSC. Because it packs so much satellite tech into a tiny package, you sacrifice the ability to trigger that closed-loop VHF alarm on your mother ship. It will call the Coast Guard via satellite, and it will put your 972 target on the chartplotter via AIS, but it will not set off your boat’s VHF radio alarm.

The Administrative Nightmare (A Real-World Warning): PLBs operate on global satellite networks, meaning they are hardcoded to specific country codes. If you buy a device abroad, you must get it factory-reprogrammed before you can legally register it in your home country. (in many countries it is a legal requirement to register your PLB)

When my own PLB3 arrived, I called the Swiss distributor to get it reprogrammed. Incredibly, they had no idea about the country coding rules and told me they couldn’t do it. I ended up having to inform the national distributor that they needed to take a factory training course just to be able to legally reprogram my device! (this was in the process of being corrected at the time of writing) Don’t leave your beacon admin to the day before you cast off.

The Pragmatic Workaround: If you buy a PLB abroad and it arrives hardcoded to a foreign country just days before you cast off, you don’t have to sail unprotected. The global Cospas-Sarsat system routes alerts based on the beacon’s embedded country code, not your passport. As a temporary fix, you can legally register the device on that specific country’s national database (e.g., the French CNES registry if it has a French code) using your actual emergency contact details. If activated, the alert simply routes to that country’s MRCC first, who will verify the emergency and immediately pass the coordination to the local Coast Guard sector you are floating in. It adds a minor administrative hop, but it gets you off the dock safely until you can get the device factory-reprogrammed at home.

6. Garmin inReach and similar devices

The Garmin inReach & Satellite Messenger Disclaimer It is worth addressing devices like the Garmin inReach, as many sailors wonder if they can replace a dedicated personal rescue beacon. While the inReach is a fantastic piece of kit, it is a Satellite Messenger, not a purpose-built MOB survival tool.

Yes, it has a dedicated SOS button, but that is where the similarities end.

• Activation & Ergonomics: It cannot be automated. To get a signal out, you have to physically hold the device up out of the water to maintain a view of the satellites.
• Durability: While it is water-resistant (typically IPX7, meaning 1 meter for 30 minutes), it is not built for prolonged immersion in a heavy sea state.
• Transmission Power: An inReach transmits at roughly 1.5 watts on the commercial Iridium network. A true PLB blasts a 5-watt signal on the dedicated Cospas-Sarsat military/SAR network.
• No Local Rescue: Crucially, an inReach has no AIS component. It cannot alert the boat you just fell off.

Where the inReach actually shines is two-way communication. If you are in a liferaft or dealing with a dismasting, being able to text rescue services the specific details of your emergency (or reassure your family) is invaluable. Keep it in your grab bag, use it to pull localised weather forecasts or text a shore-based router, but do not clip it to your lifejacket expecting it to be your primary man-overboard beacon.

7. The Unvarnished PLB vs AIS Buying Guide: Which One Do You Need?

Most articles stop at the tech specs. But at All Winds Adventures, we look at the human element. The beacon you buy should depend entirely on the crew you sail with.

Scenario A: The Solo Sailor or Remote Cruiser

You need a PLB or the hybrid PLB3. If you fall off, your boat is sailing away without you. There is no one at the helm to look at the chartplotter. You need the global Coast Guard.

Scenario B: The Fully Crewed Boat in Busy Waters

If you are racing in the Solent or chartering with six competent mates in the Med, get an AIS-MOB with DSC (like the MOB1 or MOB2). If you fall in, it sets off the VHF alarm, your crew sees your exact 972 location on the screen, and they come get you now, rather than waiting for a helicopter.

Scenario C: The Cruising Couple (Mixing Experience Levels)

This is the most common scenario we see: a couple sailing together where one person has more experience handling emergencies single-handed. Even if both sailors are highly competent (like my partner Karin, who routinely takes solo night watches), we still recommend mixing your technology.

The more experienced person wears the PLB3: If they fall in, the person left aboard may be overwhelmed trying to manage the boat and execute a recovery single-handed in rough weather. The PLB3 ensures the Cospas-Sarsat satellite network is immediately alerting the MRCC to coordinate a rescue, taking that massive burden off the person left aboard, while simultaneously putting the AIS target on the screen for passing traffic. You should, however, be aware that there is no DSC alert sent to local boats.

The less experienced sailor wears the AIS-MOB (with DSC): If they fall in, the DSC alarm wakes the more experienced skipper up. The skipper has the skills to track the 972 target on the plotter, execute a quick-stop manoeuvre, and pull off a textbook MOB recovery alone.

The Bottom Line: Gear Doesn’t Replace Drills

The most expensive beacon in the world is utterly useless if the person left on board doesn’t know how to heave-to, mark a waypoint, or throw a throwing line, or if you have not thought about how you might recover an unresponsive, incapacitated or exhausted person from the water.

You cannot buy competence in a chandlery.

If you want to make sure your crew actually knows what to do when the DSC alarms go off, that is exactly why we run our coaching trips. We don’t just teach you what buttons to press; we take you out on the water, throw a fender overboard, and make you execute the recovery until it becomes muscle memory.

Need Advice or Looking to Get Your Hands on a Beacon? The marine electronics market is a minefield of changing regulations and confusing tech specs. If you’re prepping for a bareboat charter and aren’t sure what to buy, or if you are ready to purchase a new, fully compliant unit, drop us a line. As a registered dealer, we’re always happy to talk safety gear and make sure you have exactly what you need for your trip.

Coming Summer 2026: Swiss AIS-MOB Rentals Based in Switzerland and not ready to drop 500 CHF on a unit for a single week on the water? We are launching a dedicated AIS-MOB rental programme this summer. You’ll be able to rent a Class M compliant beacon that clips straight to your lifejacket for a fraction of the retail price. If you are interested in renting one for your next charter, get in touch now so we can put you on the radar as we build out the fleet.

The post PLB vs AIS (MOBs): The Honest Guide to Electronic Lifesavers appeared first on All Winds Adventures.

TL;DR Summary for Skippers:

• The Reality: Every sailor will eventually face an emergency. Even the elite pros making multi-million Euro mistakes.
• The Strategy: Disasters are a chain reaction (like a messy cockpit leading to a wrapped prop). Your job is to break the “Chain of Disaster” early.
• The PAME Framework: Always use Plan, Approach, Manoeuvre, Escape before committing to any high-risk boat handling.
• The Action: When chaos hits, hit your mental “Reset Button” (Stop, Breathe, Think). Always prioritise People first, Hull second, and Rig/Engine third.

If you spend enough time around boats, you will eventually realise a harsh truth: It’s not “If”, it’s “WHEN”!!!.

There is no worse sound on a bareboat charter holiday than the engine suddenly choking and dying as you reverse into a tight marina berth. The sea is unpredictable; equipment breaks, and as humans, we all make mistakes. I’ve spent 40 years on and around the water, and I can promise you that no skipper is perfect.

Even elite offshore professionals screw up. Look at the last Ocean Race: Charlie Enright’s 11th Hour Racing team suffered a massive, hull-crushing collision with Guyot environnement right at the start of the final leg. But they didn’t fall apart. They managed the immediate catastrophe, bounced back, and actually went on to win the entire global event. Elite sailors make mistakes. The difference isn’t that they are perfect; the difference is how they keep a mistake from becoming a disaster, and how they bounce back afterwards.

Whether you are sailing on a Swiss lake or navigating a 45-foot catamaran in Croatia, here is how you handle the chaos when things go wrong on the water.

1. Recognise “The Chain of Disaster”

Disasters are rarely one single event. They are almost always a chain reaction. The equation can often look something like this:

Minor Error + Fatigue + Rushing + Bad Weather = Catastrophe.

Let’s look at a highly realistic bareboat charter example:

• The crew is tired after a long sail and leaves the cockpit a tangled mess of lazy sheets.
• As you motor into a crowded marina in a crosswind, a sheet or a trailing mooring line fall into the water.
• The prop sucks it up and stops the engine dead.
• You have no propulsion, no steering, and you are drifting sideways into a million-Euro superyacht.
• Crash.

The strategy as a skipper is to catch the “Links” early. Prevention is better than cure. This means keeping a tidy “shipshape” cockpit and doing your safety briefings to tell the crew what to do before the drama starts.

2. The PAME Method: Always Have an Escape Route

I learned this acronym on an RYA Powerboat Instructor course back in the late 90s, and it has saved my bacon more times than I can count. Before you commit to any tight docking or complex boat handling, run through the acronym PAME:

• P – Plan: What is the exact goal? (e.g., Docking stern-to on the windward pontoon).
• A – Approach: How are we getting there? What are the wind and tide doing?
• M – Manouvre: The actual execution of the plan.
• E – Escape: This is the most critical step. If a gust hits or the engine fails halfway through the manoeuvre, how do we bail out safely?

If you don’t have an Escape route, do not start the Approach.

3. Hit the “Reset Button”

When chaos hits, panic is the enemy. Panic causes tunnel vision, making the world shrink and making it very easy to miss something critical.

Let’s go back to 11th Hour Racing: On the wall of their cockpit, they literally had half a red tennis ball glued to the bulkhead. That was the team’s physical “Reset Button.” When things went sideways, they physically hit it to break the hypnosis of panic.

STOP, BREATHE, THINK.

Follow this cycle to regain control:

• Stop: Take your hands off the wheel, put the engine in neutral, or heave-to.
• Crew Welfare: Is everyone ok?
• Calm: Stay calm yourself—don’t make the situation worse with your own emotion. No shouting!
• Assess: What is actually wrong? Get feedback from your crew.
• Plan: Communicate the fix to the team.

Always remember your priorities:

1: People (Lives & Injuries)
2: Hull (Keeping the water out)
3: Rig & Engine (Propulsion)

4. Buy Yourself Time

If you are overwhelmed, you need to buy time. The ultimate way to press “Pause” on a sailing yacht is to Heave-to. Assuming you have the sea room, heaving-to stops the motion, flattens the boat, and allows you to make coffee and think.

5. Real-World Scenario: The Prop Wrap

Let’s say the nightmare happens: the engine just stopped dead because of a wrapped line.

1. Immediate Action: Put the gear into NEUTRAL immediately. Do not try to restart it, you risk either making it worse or damaging the sail drive.
2. Assess: Are we in immediate danger from rocks or other boats?
3. Plan: Can we sail out of it? (Plan A). Should we drop the anchor to buy time and stop the drift? (Plan B). Or do we need to dive to clear it? (Plan C—Only if safe, engine off, keys in your pocket, spotter on deck).

The Bottom Line

Sh!t happens. There is often no definite right or wrong answer. You have to draw on your toolbox of skills. Prepare well, clear the cockpit, use the PAME framework, and when the chaos hits: hit the Reset Button.

Are you ready to take the helm with confidence? The best way to handle a catastrophe is to stop the chain before you even leave the pontoon. If you are planning your next sailing holiday, download the free All Winds Skippers Decision Matrix to help you make safe, objective “Go/No-Go” decisions.

If you want a Yachtmaster in your corner to help you practice these catastrophe management skills in the real world, check out our Skipper Coaching Weeks in Croatia and Switzerland.

The post Sailing Safety: The Skipper’s Guide to Catastrophe Management appeared first on All Winds Adventures.