Man Overboard Recovery: The 5 Critical Steps Every Boater Must Know

I've run man-overboard drills with professional crews who could execute a recovery in 90 seconds. I've also seen recreational crews freeze for 30 seconds while a crew mate disappeared in 60-degree water — by the time they reacted, the person was 100 yards astern and climbing into the danger zone of hypothermia. The difference between these outcomes isn't talent — it's preparation. This guide is the preparation.

The Statistics Are Grim

Step 1: Alarm + Flotation (0-5 seconds)

The moment someone goes over, you have one priority: alert everyone. The first 5 seconds determine the next 30 minutes.

1. Shout "Man overboard!" — loud enough to be heard at the helm. Repeat it.
2. Throw a Type IV throwable PFD or life ring in the direction of the person — even if you miss, it creates a debris field marking the location.
3. If sailing, head up into the wind immediately to stop the boat from sailing away from the person.

The throwable PFD is your insurance policy. Even if the person is wearing an inflatable PFD, a throwable gives them something to grab if they're injured or disoriented.

Step 2: Assign a Pointer (5-15 seconds)

This is the most overlooked step, and the one that saves the most lives. One crew member must point at the person in the water continuously, without looking away, until the boat is alongside them.

Step 3: Mark the Position (10-20 seconds)

Every modern GPS chartplotter has a MOB button. Press it. This drops a waypoint at your current position — not the person's position, but close enough to navigate back to. On most Garmin, Simrad, and Raymarine units, the MOB button also computes a direct navigation route back to the waypoint.

If you don't have a GPS MOB button (older vessels), note your compass heading and the time. Memory degrades fast in an emergency.

Step 4: Execute the Recovery Turn

The recovery turn brings the boat back to the person under control. There are three standard methods — practice all three and use the one your boat handles best.

Method 1: Quick Stop (Best for Sailboats)

The Quick Stop is fast and keeps the boat close to the person. The disadvantage is that it requires immediate heads-up sailing — you can't do it slowly.

1. Tack immediately (or jibe if on a run, but tacking is safer).
2. Sail on a beam reach for 2-3 boat lengths.
3. Tack back toward the person.
4. Approach on a close reach, sails luffing, under control.
5. Stop the boat alongside the person on the leeward side.

Method 2: Anderson Turn (Best for Powerboats)

The Anderson turn is a simple 270-degree turn that brings you back on your original course in the opposite direction. It's easy to execute and works at any speed.

1. Turn the wheel hard over in the direction of the person.
2. Continue the turn through 270 degrees.
3. Approach the person on the opposite course, into the wind/waves.
4. Stop the boat alongside, leeward side toward the person.

# MOB recovery approach calculator
def mob_approach(
    boat_speed_knots: float,
    reaction_time_sec: float,
    wind_speed_knots: float,
    sea_state_ft: float,
) -> dict:
    """Estimate the distance the person will drift and the approach geometry.
 
    Real-world recovery is dictated by practice, not math. This model
    gives a rough sense of how far the situation deteriorates in the
    first 60 seconds — the 'golden minute' of MOB response.
    """
    # Boat travels away from MOB at boat_speed during reaction_time
    # Then continues for 2-3 boat lengths during the recovery turn
    boat_length = 30  # feet
    drift_away_ft = boat_speed_knots * 1.68781 * reaction_time_sec  # knots→ft/s
 
    # Person drifts downwind at ~2% of wind speed (leeway)
    person_drift_ft = wind_speed_knots * 1.68781 * 60 * 0.02
 
    # Closing time after recovery turn (assume 2 boat lengths at approach speed)
    approach_speed = min(boat_speed_knots * 0.5, 4)  # approach at 4 knots max
    closing_time_sec = (2 * boat_length) / (approach_speed * 1.68781)
 
    # Total time from MOB to alongside
    total_time_sec = reaction_time_sec + 30 + closing_time_sec  # 30s = turn time
 
    # Hypothermia risk in water below 60°F
    if sea_state_ft < 3:
        conditions = "favorable"
    elif sea_state_ft < 6:
        conditions = "challenging"
    else:
        conditions = "dangerous — recovery may not be possible"
 
    return {
        "boat_drifted_ft": round(drift_away_ft, 0),
        "person_drifted_ft": round(person_drift_ft, 0),
        "closing_time_sec": round(closing_time_sec, 1),
        "total_recovery_time_sec": round(total_time_sec, 0),
        "sea_conditions": conditions,
    }
 
# 6-knot sailboat, 5-second reaction time, 15-knot wind, 3-foot seas
print(mob_approach(boat_speed_knots=6, reaction_time_sec=5,
                   wind_speed_knots=15, sea_state_ft=3))
# → Boat drifts ~50 ft, person drifts ~30 ft, total recovery ~70 seconds

Method 3: Williamson Turn (For Low Visibility)

The Williamson turn is slower but brings you back on a reciprocal course — essential when you can't see the person (night, fog). It's the standard method for large vessels.

1. Turn hard over in the direction of the person (60 degrees).
2. Shift rudder hard over to the opposite side when 60 degrees off original course.
3. Continue turning until you're on the reciprocal course (180 degrees from original).
4. Approach dead ahead, slowing to bare steerageway.

Step 5: Recovery From the Water

The boat is alongside. Now what? Getting a wet, possibly hypothermic, possibly injured person out of the water is harder than getting to them.

The Lifesling Recovery

The Lifesling is the most effective MOB recovery device for recreational boats. It's a floating horseshoe that the person steps into, then you winch them up to deck level using a halyard or block-and-tackle. The person's weight is supported by their torso, not their arms.

1. Circle the person with the Lifesling towed astern on a 50-foot line.
2. Person grabs the sling and steps into it.
3. Haul them to the boat using the tow line.
4. Lift them aboard using a halyard (sailboat) or block-and-tackle (powerboat) attached to the sling's lifting ring.

Boarding Ladder

For smaller, uninjured victims, a boarding ladder deployed over the leeward side works — but the person needs to be able to climb, which hypothermic victims often cannot. A ladder is recovery equipment, not rescue equipment.

Practice Drills — Twice a Season

The drill that saves lives is rehearsed until it's automatic. Here's a 30-minute drill you can run with your regular crew:

1. Throw a fender overboard without warning. Yell "MOB!"
2. Time the response: How long until someone points? How long until flotation is in the water? How long until the MOB button is pressed?
3. Execute the recovery turn. Note your approach angle and speed.
4. Recover the fender. Note how hard it is to lift 5 pounds of plastic from the water — then imagine a 180-pound person.

Equipment Checklist

Final Thoughts

Man-overboard recovery is the seamanship skill you hope to never use, but if you do, you have one chance to get it right. The drills are inconvenient, the equipment is expensive, and the topic is uncomfortable. None of that matters when someone goes over the side at 8 PM in October. Practice the five steps. Equip the boat properly. Assign roles before you leave the dock. The life you save will be the one sitting next to you.