Man Overboard Gear Buying Guide: Mark, Reach and Recover
Quick answer: Man overboard gear has three jobs: mark the person so you do not lose sight of them, reach them with flotation, and recover them back aboard. At minimum, boats 16 feet and longer must carry a Coast Guard approved Type IV throwable (a ring buoy or cushion) that is immediately available. A solid setup adds a 50 to 75 foot throw bag, a water-activated light, an electronic MOB alarm, and a reboarding ladder or recovery system someone in the water can actually use.
A person in the water disappears fast. In a 2 foot chop, a head is hard to see at 100 yards, and at 20 knots you cover that distance in about 10 seconds. Getting them back aboard is often harder than finding them, especially if they are cold, tired or injured. The right gear, stowed where it can be deployed in seconds and practiced with before you need it, is what turns a frightening moment into a short one. This guide covers each piece of the system.
Step 1: Mark the spot instantly
- Shout and point. Assign one person to keep eyes and an arm on the swimmer the whole time.
- Press MOB on your chartplotter to save the position.
- Throw something that floats right away, even if it is only a cushion. It marks the spot and gives the person something to hold.
- At night, a water-activated strobe or light on the throwable and on every life jacket is the difference between finding someone and searching blind.
Electronic MOB systems automate this step. A small tag worn by each crew member or clipped to a life jacket loses its link to a base unit or phone when it goes into the water, which sounds an alarm and logs the position. Some systems can also shut down the engine.
Step 2: Reach them with flotation
| Device | Effective reach | Best for |
|---|---|---|
| Type IV throwable cushion | About 15 to 25 ft by hand | Small boats, fast first throw |
| Ring buoy (20 to 30 in) | About 20 to 30 ft, more with a line | Larger boats, docks, commercial use |
| Throw bag with 50 to 75 ft line | About 50 to 75 ft | Reaching someone downwind or in current |
| Recovery sling on a long floating line | Circled to the person under power | Shorthanded crews and sailboats |
A throwable is required, but a throw bag is often the most useful tool. You throw the bag, the line pays out, and you can pull the person to the boat instead of maneuvering a running propeller close to them. Always approach from downwind, and shut down or put the engine in neutral before the person is near the stern.
Step 3: Plan for recovery
Getting an adult with soaked clothing up and over a gunwale is genuinely hard. Options, from simplest to most capable:
- A reboarding ladder that a person in the water can reach and deploy unaided. See our boarding ladder guide for step count and mounting.
- A portable folding or rope ladder clipped to a cleat or rail on boats without a permanent ladder.
- A recovery sling on a floating line, circled around the person so they can slip it under their arms, then hauled in and lifted with a winch or block and tackle.
Practice in calm water with a volunteer or a weighted dummy. Most crews discover their plan does not work on the first try.
Step 4: Make every life jacket a locator
Attach a whistle and a personal strobe or light to every life jacket aboard, and wear an inflatable or vest when underway in rough water, at night, or when alone. A personal locator beacon or AIS MOB device adds satellite or AIS alerting for offshore trips. Our EPIRB and PLB guide explains the options.
Step 5: Stow it so it deploys in seconds
- Mount ring buoys in a rail bracket near the cockpit, not in a locker.
- Keep the throw bag at the stern where you can grab it without moving gear.
- Brief guests before leaving the dock: where the throwable is, who watches the swimmer, and how to stop the boat.
Common man overboard mistakes
- Taking eyes off the person while everyone scrambles for gear.
- Approaching with the propeller turning near a swimmer.
- Throwable buried under fenders or used as a seat cushion in the cabin.
- No reboarding plan for a cold or injured person.
- Never practicing, so the first real attempt is during the emergency.
Our picks for man overboard readiness
All in stock at Boat Supplies Direct.
Electronic MOB alarm
ACR OLAS Core with ACR OLAS MOB Float-On Light tags that trigger an alarm and mark the position when a crew member goes in.
Ring buoy and bracket
Kent 24 in Ring Buoy, Coast Guard approved Type IV with reflective tape, mounted in a Whitecap Stainless Ring Buoy Bracket.
Throw bags
Mustang Throw Bag with 75 ft Rope for maximum reach, or the Onyx Commercial Rescue Throw Bag 50 ft for smaller cockpits.
Lights for every life jacket
ACR C-Strobe H20 water-activated strobe, or the Forespar WL-1 Floating Strobe Water Light to tether to a ring buoy.
Emergency reboarding
Sea-Dog 3 Step Folding Ladder that clips to a cleat or rail, or the T-H Marine Twist Step Emergency Ladder for outboard boats.
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Frequently Asked Questions
What man overboard gear do I need on a boat?
A Coast Guard approved Type IV throwable is required on boats 16 feet and longer. Add a throw bag, lights on every life jacket, and a ladder or recovery system so the person can get back aboard.
What is a Type IV throwable device?
It is a throwable flotation device such as a ring buoy or seat cushion, designed to be thrown to someone in the water. It must be Coast Guard approved and immediately available, not stowed away.
How long should a throw rope be?
50 to 75 feet covers most recreational situations. Longer lines help in current or when the boat cannot safely get close.
What is the first thing to do in a man overboard situation?
Shout man overboard, point at the person and keep pointing, throw flotation immediately, and press MOB on the chartplotter. Then turn back and approach from downwind with the engine in neutral near the swimmer.
Why is it so hard to get someone back aboard?
Wet clothing adds a lot of weight, cold water saps strength within minutes, and gunwales are high. A ladder that reaches well below the waterline or a sling with mechanical advantage makes recovery possible.
Do electronic MOB systems work on small boats?
Yes. Tag-based systems pair with a base unit or phone and alarm the moment a tagged person goes in, and some models can also shut down the engine.
This guide is general information. Follow U.S. Coast Guard carriage requirements and state regulations, the manufacturer's instructions for each device, and practice man overboard drills in safe conditions before relying on any system.
