Equalisation Technique: The Skill That Makes or Breaks Dives

Ask any instructor what causes the most dropped dives, aborted descents, and grumpy surface intervals, and equalisation will come up before almost anything else. It is such a basic-sounding skill, just "clear your ears," that many divers never actually learn to do it properly, and it quietly limits their diving for years. Get it right and descents become smooth and comfortable. Get it wrong and you are looking at pain, ear injuries, and dives cut short before they really begin.

Why Equalisation Matters More Than Most Divers Think

As you descend, water pressure increases and pushes against your eardrum from the outside, while the air space in your middle ear stays at the pressure it was at the surface. Left unmanaged, that pressure difference causes discomfort within the first few metres and can escalate quickly to genuine pain or barotrauma. Good equalisation keeps the pressure on both sides of your eardrum balanced throughout the descent, which is what actually makes a dive comfortable rather than something to grit your teeth through. It is also worth remembering that equalisation is not a one-off event at the start of a dive, it continues on every metre of every descent, and again in reverse to a lesser extent on ascent, which is why building a reliable technique early pays off for the rest of your diving life.

This is a skill we spend real time on during Open Water training, precisely because divers who struggle with it early often end up avoiding diving altogether, assuming it is simply something they are not suited to. In the vast majority of cases that is not true, they just never learned a technique that actually worked for their own anatomy.

Common Mistakes We See

Equalising Too Late

The single biggest mistake is waiting until your ears already hurt before doing anything about it. By that point you are trying to open a passage that pressure has already partially closed, which is far harder and sometimes impossible without ascending first. Equalising should start before you even feel any discomfort, ideally at the surface and then every metre or so on the way down.

Descending Too Fast

Rushing a descent, often out of nerves or a desire to keep up with the group, gives your ears no time to keep pace. Slowing down, even by a few seconds per metre, makes a genuine difference to how comfortable the whole dive feels.

Forcing It

Blowing hard against pinched nostrils when equalisation is not working is a common instinct, but excessive force can injure the inner ear. If a gentle attempt is not working, the right move is to ascend slightly and try again, not to push harder.

Ignoring a Cold or Congestion

Diving with a blocked nose or a lingering cold is one of the most common causes of equalisation trouble we see, and it is also one of the most avoidable. Congestion can trap air in the middle ear on ascent as well as making descent harder, which is a genuinely unpleasant combination. If you are congested, the honest advice is to skip the dive rather than push through it.

Techniques Worth Learning

The Valsalva manoeuvre, gently pinching the nose and blowing, is what most divers learn first, but it is not the only option and not always the best one. The Toynbee manoeuvre, pinching the nose while swallowing, works well for divers who find Valsalva difficult. The Frenzel technique, using the tongue and throat muscles to push air into the middle ear without heavy exhalation, tends to be gentler and more controllable once learned, and many instructors and technical divers prefer it for exactly that reason. Some divers eventually develop a hands-free technique using voluntary muscle control, though this usually takes real practice to master properly. There is no single correct answer for every diver, and part of good instruction is helping you find the version that actually works for your own anatomy rather than insisting on one method for everybody.

How to Practice Before You Dive

Equalisation technique is something you can genuinely practice on dry land. Try each method sitting at your desk and notice which one feels easiest to control. Practising little and often on land builds the muscle coordination you need underwater, where you cannot exactly pause and look up a diagram. It is also worth practising in the shallow end of a pool, where you can descend slowly and repeatedly without the pressure of a real dive plan running in the background.

For families learning together, this is a genuinely good bonding exercise during half term, since younger divers often pick up the coordination faster than adults expect, and practising side by side takes some of the pressure off a skill that can otherwise feel intimidating on a first course. A few relaxed minutes in a pool, well before a real open water dive is on the calendar, makes a noticeable difference to how confident everyone feels once the actual descent begins.

What Instructors Look For

During training, instructors are watching for divers who equalise early and often rather than reactively, who descend at a controlled pace rather than dropping like a stone, and who communicate clearly when something is not working rather than pushing through discomfort. A diver who signals "ears" and pauses to sort themselves out is showing exactly the kind of awareness we want to see, not a lack of ability.

We also pay close attention to body position during descent, since divers who are tense, upside down, or fighting the water tend to struggle with equalisation even when their technique is otherwise sound. A calm, controlled, head-up or gently feet-first descent gives you far more control over timing than an awkward tumble toward the bottom, and it is one of the simplest adjustments that makes a genuine difference for divers who have been struggling.

Frequently Asked Questions

Why do my ears clear fine on some dives but not others?

Minor congestion, dehydration, tiredness, and even how relaxed you are on a given day can all affect how easily you equalise, which is why the same diver can have a perfectly comfortable descent one day and a frustrating one the next.

Is it normal to still find equalisation difficult after several dives?

Yes, and it is worth working with an instructor rather than assuming it will simply resolve itself. A short one-to-one session focused purely on equalisation technique can make a bigger difference than dozens of dives without any specific feedback.

When to Stop and Descend Slowly, or Not at All

If your ears are not clearing after a couple of gentle attempts, the answer is almost always to ascend a metre or two, let the pressure equalise, and try again slowly rather than forcing it. Persistent difficulty on multiple dives is worth mentioning to an instructor or getting checked by a doctor familiar with diving medicine, since congestion, sinus issues, or anatomical quirks can all play a role. There is no prize for pushing through ear pain, and plenty of good reasons to sort it properly instead.

Want hands-on coaching on equalisation and other core skills? Explore our course calendar or get in touch to talk through the right course for you - we're at Bellman Court, Great Knollys Street, Reading, or call +44 (0) 118 9761 729.