What to do if a diver is unconscious underwater: towing to the surface and rescue breathing

When a diver is unconscious underwater, the key move is to tow them to the surface and begin rescue breaths. This prioritizes airway and breathing, reduces drowning risk, and sets the stage for further emergency care while help is on the way.

When you’re underwater with a buddy and suddenly an unconscious diver surfaces in your world, everything slows down and everything speeds up at once. Your training isn’t a script so much as a compass. It points you toward action, toward safety, toward the very human instinct to help another person breathe again. Here’s the plain truth: the moment you recognize a loss of consciousness beneath the surface, you don’t wait. You act. You move. You rescue.

Let me explain the core idea in simple terms. An unconscious diver can’t protect their airway, can’t signal you, and can’t tell you what they need. In that moment, drowning becomes the immediate threat. The priority is to get the diver to safety and begin rescue breaths as soon as possible. Everything else can wait. It’s not about heroic heroics; it’s about applying basic, practical steps that keep someone breathing until you can hand them off to professional help or until they regain consciousness.

Toward safety, not toward panic

One of the most important mental moves is to keep calm. Panic makes you forget the steps, and fear tends to spread through a group faster than a current. Take a quick breath yourself, then focus on the next practical move: tow the diver to the surface while starting rescue breaths. The aim isn’t to wrestle a heavy load upward single-handedly; it’s to maintain control, keep the diver’s airway open, and bring them to a place where air and first aid can be given.

Tow to the surface: a practical playbook

• Maintain buoyancy and control: First, check your own buoyancy. You want a steady, controlled ascent. If you’ve got a buddy, use the buddy line or agreed hand signals to coordinate. The goal is a predictable ascent rather than a frantic sprint to the surface.

• Approach with care: As you start your ascent, keep the unconscious diver close but not pressed into you. A gentle tow helps them stay in a relatively stable position, reducing the risk of jaw closure or airway obstruction caused by movement.

• Clear the airway: In an unconscious diver, airway protection is the first priority. If you can, tilt the head back slightly to open the airway as you tow. If a mouthpiece or regulator is still in place, you’ll manage that as you surface. The important part is to prevent tongue obstruction and allow breath to move if rescue breaths are to come later.

• Monitor—don’t abandon—your own safety: You’re carrying both risk and responsibility. If the ascent becomes challenging because of current, depth, or fatigue, switch to a controlled stop-and-breathe approach. Your life matters too; you won’t be any good to anyone if you tire out.

Rescue breaths: giving them the chance to breathe again

Once you reach the surface, the clock is still ticking. The unconscious diver needs air, and you’re the bridge to that air, at least for the moment. If you’ve got someone with you, turn to them for assistance and set up a system for CPR or rescue breathing. If you’re alone, do what you can safely manage and seek help immediately after the initial steps.

• Check responsiveness and breathing: At the surface, get their airway clear and check for breathing. If you’ve got the skills and a mask, begin rescue breaths. If not, direct your buddy or contact emergency services and prepare for CPR if the person remains unresponsive.

• Deliver rescue breaths with care: In rescue breathing, you’re delivering small, steady breaths to inflate the lungs. The focus isn’t on volume or dramatic efforts; it’s about maintaining a rhythm that supports gas exchange until professional help arrives.

• Use equipment if available: A surface rescue may involve a snorkel, a regulator, or an oxygen kit if you’ve got one on standby for emergencies. Use what you have to ensure the diver receives air without delay.

Why this order matters

You might have heard other lines—some suggest waiting, or leaving the diver alone, or letting them recover on their own. That’s not how this works in the real world. An unconscious diver underwater is at risk of drowning because the airway isn’t protected, and their chest may not be moving air effectively. The quickest, most reliable way to interrupt that risk is to bring them to safety and start breathing support as soon as you can. It’s a straightforward, practical sequence: bring them up, secure the airway, begin rescue breaths if needed, and call for help.

A few practical nuances worth noting

• Buddy system matters: Diving with a buddy isn’t just about shared fun; it’s a built-in safety net. If you’re with a buddy, coordinate early and practice clear signals for a scenario like this. The goal is seamless teamwork—two people, one mission: get the diver breathing again.

• Equipment checks: An unconscious diver might be wearing a full kit, which complicates a quick surface tow. If possible, manage gear so it doesn’t snag or hinder the ascent. Unclip or stabilize flippers, secure hoses, and keep the airway clear. It’s not about being a perfectionist; it’s about reducing friction during a critical moment.

• Surface safety: Once at the surface, don’t linger too long in a hazardous spot—whitewater, strong current, boat traffic. Move to a safer zone, even if it means adjusting your position to keep both of you safe while you work on breathing.

• Oxygen on deck: If you have access to an oxygen supply, using it for an unconscious diver can be a game changer. Administer oxygen when available and appropriate, and get professional help on the line as soon as you can.

• Debrief the moment: After the dust settles, take a moment to review what happened. Not to assign blame, but to learn. What signals did you miss? How did the ascent feel? What could you tweak next time to shave seconds off the response? Small tweaks keep you ready.

The ethic that underpins the action

There’s a quiet ethos in diving that often goes unsaid: a diver looks out for another diver. That duty doesn’t come with a badge or a certificate; it’s a lived habit. When faced with an unconscious diver, the instinct to act—now—sits at the heart of responsible diving. It’s about showing up for someone else when it really matters. And that, honestly, is what makes lifelike stories of the ocean so compelling. It’s not just about the thrill of the deep; it’s the humanity you bring to a situation that could save a life.

A few gentle reminders to carry with you

• Practice makes confidence, not bravado: Regular, scenario-based drills (with proper safety supervision) help you react naturally when pressure rises. You don’t need to “perform” under stress; you need to respond with practiced calm.

• Keep it simple: The best moves are the ones you can execute cleanly under stress. Complex maneuvers are great in theory, but in a real moment, straightforward actions win.

• Protect your own well-being: You’re not a bystander to your own safety. If you’re exhausted, overwhelmed, or unwell, that’s a signal to pause and regroup. Safe rescuing relies on safe rescuers.

• Share the knowledge: Talk about these scenarios with fellow divers and mentors. Open conversations about what works and what doesn’t helps everyone stay sharp.

A final reflection—empathy, skill, and the sea

The ocean is generous, but it’s not forgiving. It will push you to your limits, test your quick-thinking, and expose you to the unexpected. In that setting, the most human thing you can do is respond with a blend of empathy and competence. An unconscious diver isn’t a problem to solve in a vacuum; they’re a person who trusted the water and the people who share it with them. When you act—toward the surface, toward breathing, toward safety—you honor that trust.

If you ever find yourself in a situation where an unconscious diver surfaces near you, remember: your first move is to secure both of you and begin rescue breaths as soon as possible. Every second matters, not as a grim countdown, but as a clear, practical path to getting air where it’s needed most. The sea can be a teacher, offering hard lessons wrapped in blue and bubbles. The lesson, when it’s truly needed, is simple: act with care, act without hesitation, and keep the line between safety and tragedy as short as possible. After all, we’re not just ocean enthusiasts—we’re guardians of each other in a world that’s bigger than any single breath.