Scuba diving panic: what to do and how to prevent it

“I’ve personally rescued and assisted in more situations involving diver panic than I’d like to admit.” Manie Eksteen

Manie Eksteen, our founder, is a PADI Staff Instructor with 10,000+ hours underwater.

Panic is what happens when fear takes over from thinking. DAN describes a diver who is startled or faces a difficult problem, becomes overwhelmed by fear or anxiety and starts to behave wildly. Underwater, that can look like spitting out a regulator that is delivering air, tearing off a mask, or heading for the surface as fast as possible. None of it is a considered choice.

The panic spiral

Most panic builds gradually, through a spiral that looks like this:

A stressor appears → breathing rate increases → air consumption accelerates → available air drops → anxiety intensifies → breathing gets faster → air drops further → rational thinking degrades → full panic.

By the time the mask comes off, the spiral has usually been running for a while. The final trigger (low air, a foggy mask, losing sight of the guide) is rarely the whole story. It’s the last domino. The real cause is everything that came before it. DAN Europe’s Alert Diver magazine describes the same pattern: stress and fatigue that build up before the dive, then a small, routine event, such as a mask coming off, that tips the diver over.

“That panic at 10 metres didn’t start at 10 metres. It started on the dock.” Manie Eksteen

What panic does to the body

DAN Europe and DAN describe what panic does to breathing, to the body and to behaviour:

• Breathing turns fast, shallow and irregular, and the diver feels air hunger: the sense that air is never enough, even when air is available
• Adrenaline floods the system and the heart rate climbs
• Vision narrows into a tunnel
• Thinking clearly becomes hard, and adrenaline takes minutes to clear
• Divers struggle with equipment they could use perfectly well when calm, give improper signals and can lose buoyancy control
• The urge to reach the surface can override everything else

Understanding this changes how you respond. You are not dealing with a diver who has made a bad decision. You are dealing with someone whose ability to decide has been crowded out by fear. That is why you can’t reason with a diver in full panic, and why the time to act is early.

Most articles will tell you panic is caused by running out of air. That’s the end of the story, not the beginning.

These are the triggers that can cause, or add to, a panic event. They stack: no single one has to be big for the total to cross the line.

Before the dive even starts:

• Feeling pressured into a dive you’re not comfortable with, by a partner, a group, a guide, or your own ego
• Being hungover, underslept or physically unwell
• Diving with a buddy you don’t know and haven’t briefed properly
• Using new gear that hasn’t been tested in confined water first
• A pre-dive safety check that was rushed or skipped

Here is a full breakdown on how to do a proper pre-dive safety check, step by step

During the descent:

• Being overweighted: fighting to stay off the bottom burns air and mental bandwidth at the same time
• Being underweighted: fighting to stay down creates the same problem from the other direction
• Equalisation pain that escalates into panic about ear damage (if your ears won’t clear, stop and end the descent)
• Rushing the descent and arriving at depth disorientated, breathing fast and already behind

Check out our full guide on Scuba Diving Ascents and Descents

During the dive:

• Cold, green, low-visibility water: the environment feels hostile in a way that warm, clear water doesn’t
• A foggy or flooded mask: distorted vision is an incredibly powerful stress trigger
• Losing sight of the guide or the group
• Overexertion: swimming against a current, chasing marine life, covering too much ground
• Watching other divers and feeling like you’re the slowest, the worst, the most out of control
• Equipment malfunction: even something minor like a free-flowing regulator or a loose fin strap can cascade into panic if the diver doesn’t have the skills to manage it calmly
• Low air, especially when it arrives faster than expected

The weighting issue deserves specific mention. On a liveaboard or with a new dive operator, the guide will often estimate your weight if you don’t know it yourself.

“In my experience, when a guide is guessing, they’ll give you more rather than less, because getting a diver down is easier to manage than dealing with someone who can’t descend on the surface.” Manie Eksteen

The result can be a diver who is overweighted, fighting their buoyancy, burning through air and starting the spiral before they’ve even reached depth. That is not the guide’s fault. It’s a system problem, and the fix is to know your own weighting before you get on the boat (chapter 5 shows how to check it).

The moment something feels wrong is the moment to use this. Not when the mask is off: now.

Stop. Breathe. Think. Act.

Stop. Breathe. Think. Act. is a memory aid built on DAN’s advice to pause, think and act.

Stop. Stop what you are doing. Before you try to fix anything or signal anyone, stop kicking and hold still where you can.

Breathe. Breathe slowly and normally, and never hold your breath.

“It’s not just breathe slowly: it’s long exhalation. You’re buying your brain time before it decides you’re out of air.” Manie Eksteen

Think. What is actually wrong, and what is the fix? A foggy mask, a loose strap, a hose out of place, low air?

Act. Act on your training. If the dive is still overwhelming, tell your buddy and ascend to a shallower, more controlled depth, or end the dive as safely as you can. Ascend slowly, keep breathing normally the whole way up, follow your computer’s ascent-rate indicator and make your safety stop as you would on any dive. The basics are in Scuba Diving Ascents and Descents.

Panic skips straight to “act”, usually upward, fast, without equipment. A trained diver stops first. The difference between a managed incident and a panic event often comes down to that pause.

Watch your breathing rate

If you feel your breathing getting faster, that is your cue. Stop what you are doing, hold still where you can and let the air come to you. Then use the steps above.

Tell someone early

DAN advises talking to your buddy before the dive if you’re uneasy. Before every dive, agree how you will communicate, how you will find each other and what you will do in an emergency. Underwater, a diver who signals early is far easier to help than one who has already bolted.

Fix small problems early

Foggy mask? Clear it. Fin strap loose? Sort it. Breathing feeling slightly off? Stop, signal the guide and take a moment. A common mistake is pushing through minor discomfort in the hope it will resolve itself. Underwater, small problems compound. The solution is always: stop, deal with it, continue.

The best help comes early. The most useful things you can do are recognise trouble, help where it is simple and get the right people involved. What comes after that is rescue, which is taught and practised in Rescue Diver training, not in a lesson.

This lesson is built around a real incident: footage of a diver at 15 metres who, within seconds of the guide signalling the ascent, had her mask off, regulator out and was bolting for the surface. Our YouTube Short on diver panic is at the top of this page.

Recognise it early

The earlier you recognise a diver in distress, the more options you have. By the time the mask is off, you’re managing an emergency. Before that point, eye contact and a calm hand signal may be enough to interrupt the spiral.

“Watch the bubbles, not the face. The bubbles are the earlier tell.” Manie Eksteen

Watch for:

• A rapid bubble stream, with no pauses between exhale and inhale. A calm diver has a rhythm. A stressed diver’s bubbles are continuous
• Erratic fin kicks or arm movement: a diver fighting their buoyancy looks completely different from a diver in control
• Eyes that are wide and darting and not making contact. A calm diver looks around curiously; a stressed diver looks like they’re trying to find a way out
• Drifting above the group, instinctively moving toward the surface even before conscious panic sets in
• Poor body position: legs dropping, hands out, head up
• Struggling with equipment, giving improper signals, or going quiet and no longer communicating

At the surface the signs can be obvious: thrashing, wide eyes, a regulator spat out, a diver who has stopped communicating.

Help early, where it’s simple

If you are the buddy and you catch it early, help with the simple things straight away. Reseating an inflator hose is one example. Stay calm and reassuring, make eye contact, and signal them to stop and breathe. DAN advises helping as soon as possible with simple fixes and staying positive and reassuring.

Signal the guide and get help

If it is more than a simple fix, don’t improvise. Signal the guide straight away, and keep your own breathing slow and your own position safe. A panicking diver may thrash, so hands-on help is a job for people trained to do it. Taking control of a panicking diver, managing the ascent and helping at the surface are skills that Rescue Diver training teaches, and that is why this lesson stops here. More under Continuing your education.

A personal story from Aliwal Shoal

Manie Eksteen tells this one in his own words. It describes one instructor’s response during a training dive. It is not a technique to copy: what to do in a real emergency is taught and practised in Rescue Diver training.

I was running an Open Water course at Aliwal Shoal, one of South Africa’s best dive sites, and one I know well. We were at around 10 to 12 metres, mid-dive, and I was about to run the fully flooded mask skill. I tend to teach this mid-water rather than on the bottom: sitting on the sand isn’t realistic, and I want students building real skills, not textbook ones. Conditions were slightly surgy that day, but nothing serious.

As my student flooded the mask, I watched the eyes go wide. Not uncomfortable-wide. Panic-wide. The breathing rate spiked immediately: I could see it in the bubble stream. I was close, which turned out to matter enormously.

The mask came off. And I knew, from experience, not from thinking, that the regulator was next.

My instinct was to get my hand on it before it came out. I locked it in place. My student tried to rip it free, and I mean really tried, that adrenaline-fuelled strength that panic produces is real, but I held it. Kept it in. Kept the air supply secure. And then I just started slowly, calmly swimming us upward. My divemaster read the situation immediately, gathered the rest of the group, and brought them up behind us at a controlled rate.

We surfaced without incident. BCD inflated, student breathing, situation under control.

What I took from that dive wasn’t just “catch the signs early”, though that matters enormously, and being physically close enough to intervene made the difference. What I changed after that experience was when I teach mask skills at all.

Manie Eksteen, PADI Staff Instructor

…I stopped doing it at the beginning. Now I get students down, let them settle, let them enjoy the dive and build a bit of confidence and familiarity with the environment. I gauge their mindset, their breathing, their comfort level throughout. And then, during or at the end, when they’ve had some fun and they’re relaxed, we do the mask skills.

The change was significant. The same skill, in the same water, with the same student profile, but performed from a position of calm rather than a position of anxiety produced completely different results.

If you’re an instructor reading this, consider it. And if you’re a student who has ever been handed a flooded mask three minutes into your first open water dive and felt your heart rate spike, that’s not weakness. That’s a completely normal response to an uncomfortable skill.

So keep practising, keep getting comfortable and master the feeling of water on your face through repetition.

Manie Eksteen, PADI Staff Instructor

If you’re watching

This part is easy to overlook, but it matters.

When divers witness a panic event, they can be shaken by it. A witness who freezes, shoots to the surface or makes a chaotic decision in response to what they’re seeing can turn one emergency into more than one. The first job of every diver who is not helping is this: manage yourself.

On the dive

• Do not interfere. The guide is handling this. Untrained help, however well meant, adds chaos.
• Stay clear of the rescue. Give the diver in trouble, and whoever is helping, plenty of space.
• Do a headcount. In the commotion, it is entirely possible for another diver to keep following a turtle along the reef while the group has already started surfacing. Someone needs to check.
• Group up. Signal the other divers and stay together.
• Make your own safety stop. Your ascent still follows your plan: about 5 m (15 ft) for at least 3 minutes, and 5 minutes after a deeper or longer dive, as on every dive. A safety stop is an added precaution on every dive, and someone else’s emergency doesn’t change that.
• Look up and watch for boat traffic before you surface.

On the surface

• Inflate your BCD so you are positively buoyant, and keep your regulator or snorkel in until you need to talk. Keep your mask, fins and weights on until you’re told otherwise.
• Stay clear of the diver in trouble and whoever is helping. Give them space.
• Signal the boat. Do not assume someone else has done it. Arm up, whistle, surface marker: whatever you have. Get the boat moving toward you now.
• Think one step ahead. The diver who panicked will need help getting aboard, and the crew will need space and hands. Get on the boat when you’re told to, and keep out of the way.

The less the helper has to think about the group, the better the outcome for the diver in trouble.

After a fast ascent

A fast, uncontrolled ascent, especially with a held breath, can injure the lungs and cause decompression sickness, even after a shallow dive. Treat any symptom afterwards as an emergency: get the diver out of the water, call local emergency services, then call DAN. Oxygen from a trained person is the standard first aid, and a symptomatic diver never goes back underwater. The FAQ below has the detail, and a first-aid and emergency-oxygen course is how you become the person who can help.

Prevention is not a checklist. It is a mindset, and it starts before you put your kit together.

The warning signs start before the dive

The small complaint that isn’t about the small thing. The mask strap that’s suddenly wrong. The wetsuit zip. The water temperature. The brain is looking for a proxy: a small, socially acceptable reason to delay or exit without having to admit what’s actually going on. Stop engaging with the stated problem and ask what’s underneath it instead. Something real usually comes out.

Why divers override fear. Social pressure can put divers in the water when they shouldn’t be there. DAN advises never to dismiss a hesitant diver’s fears or pressure them in, and DAN Europe lists pressure from peers among the reasons not to dive. A partner who wants them to. Not wanting to look weak in front of the group. The sunk cost of an expensive trip. These pressures suppress anxiety. They don’t remove it. And suppressed anxiety can find its outlet at depth, when there’s no easy way out.

“You’ll be fine” is the worst thing you can say. It shuts the conversation down and sends that diver in still carrying whatever was there.

The signs to watch for. DAN lists unusual talkativeness or silence, compulsive gear checking and repeated questions among the warning signs.

Before entry:

• Repeatedly assembling and disassembling gear without reason
• Excessive gauge or equipment checking
• Visible shaking or flushing unrelated to temperature
• Rushing through the safety check to get it over with
• Stalling: finding reasons to delay
• Unusually quiet, disengaged, not making eye contact
• Or the opposite: talking too much
• Jokes about things going wrong

On the descent:

• Breathing already fast before reaching depth
• Hovering above the group instead of descending with them
• Checking the gauge over and over
• Pulling at the wetsuit or BCD
• Stopping equalisation attempts without signalling why

Catch it here, on the surface or on the descent, and you still have options. Wait until the mask comes off and you’re already managing an emergency.

Before you get to the boat

Never take a dive you’re not comfortable with. This sounds obvious. It is routinely ignored. Peer pressure, partner pressure and ego put divers in the water who shouldn’t be there. If the dive doesn’t feel right, say so. A good operator will not pressure you. If they do, that is your answer.

Dive rested. Tiredness thins your margin before the spiral begins, and DAN Europe lists fatigue among the stresses that build up before a dive. Drink water and avoid alcohol, but don’t treat hydration as protection against decompression sickness.

No alcohol before diving. Save it for after your last dive of the day. Alcohol impairs judgement and coordination and can contribute to dehydration, and a hangover is a poor start to any dive. If you’re unwell, skip the dive.

Gear and weighting

Know your weighting. It is easy to get wrong, and it can feed a panic. At the surface with an empty BCD, you should float at about eye level on a normal breath and sink slowly as you breathe out. Check it again whenever you change your suit, your cylinder or where you dive, and ask an instructor to check it if you’re unsure. If you don’t know your weighting, get a proper check in confined water before you do an open water dive with a new operator.

Overweighted divers fight their buoyancy from the first minute, burn more air and start the spiral earlier. Underweighted divers fight to stay down, which creates exactly the same result. We cover it in more detail in Mastering Scuba Diving Buoyancy.

Test new gear in a pool first. A new BCD, a new wetsuit, a new computer: anything that changes the way your kit feels or behaves should be tested in confined water before you take it into open water.

Check your kit, and your buddy’s, before every dive. Same order, every time, until it is automatic. Do your own check and the buddy check before every dive, and again after each surface interval. Your buddy’s check backs up yours. It doesn’t replace it, and neither does the guide’s.

The dive briefing

Ask questions. If you don’t understand the dive plan, say so before you enter the water. Understand the maximum depth, the turn pressure (the air reading at which the group starts heading back), and the signal for something’s wrong.

Going into a dive with unresolved questions is a stress that sits in the back of your mind the entire time.

Speak up if you’re not comfortable. If you’re feeling off (anxious, tired, unwell), tell the guide before you get in. A good operator will work with you, adjust the dive, or keep you at a shallower depth.

If the guide dismisses your concern, that is the wrong operator and the right time to stay on the boat.

On the dive

Take the descent at your own pace. Let the group wait. It is worth it: a controlled descent, feet first and ideally along a line, gets you to depth calm, equalised and breathing properly rather than flustered, fast-breathing and already behind on air.

Know your air. Build a sense of your air consumption at depth so you’re not constantly checking the gauge in a panic. A rough internal sense (at this point in the dive, at this depth, I should be around here) takes the pressure off the gauge and puts you in a more relaxed relationship with your air supply. Plan to surface with at least 50 bar (about 725 psi) still in the cylinder, and end the dive early enough to make that happen. That reserve is for emergencies. Plan as if it’s already gone.

Stay with the group. Separation is one of the most powerful stress triggers in diving. Losing sight of the guide or the other divers, especially in poor visibility, can quickly escalate a calm diver to a distressed one. Stay close enough to reach your buddy, check your gauge often and know where your buddy’s backup regulator is. If you do lose your buddy, stay calm and look around (above, behind and below) for about a minute. If you can’t find them, ascend normally and look for each other at the surface.

Common mistakes: what goes wrong and why

Ignoring the pre-dive stress check. Not a gear check. A stress check. Before you get in the water, ask yourself honestly: do I actually want to do this dive? If the answer is hesitation, that hesitation needs to be addressed, not overridden.

Assuming calm on the surface means calm underwater. Many divers feel fine at the surface and begin the spiral on descent. The change in environment (the sound, the pressure, the visibility) triggers something that wasn’t there above water. Don’t assume how you feel on the boat is how you’ll feel at 15 metres.

Over-relying on the guide. The guide plans the dive and watches the group, but your gear check, your air and your weighting are yours to look after, and so is telling someone when you’re not okay. Divers who enter the water assuming someone else will catch them if something goes wrong are setting themselves up.

Chasing the group when you’re already stressed. If you’re falling behind and you’re anxious, the instinct is to kick harder and swim faster to close the gap. This burns air, raises your heart rate and accelerates the spiral. Signal the guide, slow down and breathe instead.

This is a tricky one, because the guide may be the reason the group is moving fast and you may not be able to get their attention, or conditions may be the cause. It’s easier said than done, but try to avoid overexerting yourself, and don’t fight a current. If it’s more than you’re comfortable with, end the dive: signal your buddy and the guide, ascend together slowly and meet the boat at the surface. Carry a surface marker buoy or another signalling device so the boat can see you.

Staying in a dive you should end. There is no dive worth injury. If the dive is not going well (you’re stressed, uncomfortable or genuinely concerned), the right call is to end it. Signal the guide and your buddy and ascend together, slowly and under control. This is not failure. This is exactly what trained divers do.

Pro tips: what the textbook doesn’t tell you

Visualise before you dive. Before entry, take a minute to mentally walk through the dive. What happens if I get separated? What do I do if my air drops faster than expected? What’s my plan if something goes wrong? Having mental rehearsals for these scenarios means they’re not novel if they occur. And novel problems are what the panicking brain cannot handle.

Make eye contact during the dive. With your buddy, with the guide. Regular eye contact is a communication loop: it confirms everyone is okay, and it means distress is caught early. Divers who stare at the reef and never check in are divers who can spiral without anyone noticing.

Practise the skills you hope you’ll never need. When did you last clear your mask in open water, not just to tick a box but until you were truly comfortable? When did you last practise sharing air with your buddy? The skills that fall apart under panic are the skills that weren’t deeply enough embedded to survive the stress. Book a refresher with an instructor and practise until it’s automatic.

Debrief every dive. Not just the bad ones. After every dive, take five minutes with your buddy and ask: what went well? What felt off? Was there a moment where you felt uncomfortable? This kind of honest reflection is what turns experience into wisdom, and it is what separates divers who improve from divers who just accumulate dives.