Personal Skills, Critical Skills and Experience Dives: How UTD Training Works

A UTD course moves through three kinds of dives. Personal skills dives build buoyancy, trim, propulsion and drills. Critical skills dives add surprise failures that the team must solve and decide on, getting more complex as the course goes on. Experience dives are real dives with no new skills, where you show you can plan and run a safe dive.

By Jeremiah Gardner · Last reviewed October 17, 2026

You're swimming along the bottom, feeling good. The dive is going to plan.

Then you hear it. A hiss behind your head. Bubbles in the corner of your eye. Your instructor is somewhere behind you, and your left post is "failing."

Nobody warned you. Nobody told you which failure was coming. Now it's yours and your team's to solve.

That's a critical skills dive. And it's the part of UTD training most divers have never experienced anywhere else.

How is a UTD course structured?

UTD's standards break every course into four steps:

Academics. The classroom: the why behind everything you'll do in the water.
Introduction and practice. New skills in a controlled setting. Here the instructor is teaching you, not evaluating you.
Demonstration. Refining the skills until you can show them cleanly.
Experience dives. Real dives, where the instructor watches whether you can plan and run a safe dive.

In the water, that turns into three kinds of dives.

Personal skills dives

This is where you build the foundation. Buoyancy. Trim. Propulsion. The S-drill and the valve drill. Deploying an SMB. Handling a bottle.

Every skill is shown first, then practiced, then refined. No surprises. The goal is clean, calm, repeatable technique.

It's also where most divers meet the video debrief for the first time. It's humbling. It's also the fastest way to improve I know.

Critical skills dives

Now the instructor starts shadow diving the team and introducing failures without warning. Gas. Valves. Lights. Masks. Visibility. A lost teammate. A lost line or a lost bottle.

UTD grades these by complexity:

Level 1: a demonstration skill, like an S-drill or valve drill. No surprise.
Level 2: the same kind of failure, but by surprise, during a real dive.
Level 3: compounded. Two problems at once.
Level 4: complex and multi-compounded. Several problems, stacked.

Nobody starts at level 4. You start simple and build. The complexity grows through the course as the team proves it can handle it.

Here's the thing to understand going in. There's no trick answer to memorize. The list of possible failures is huge, and they can be combined endlessly. Trying to guess the instructor's plan, or prove the instructor wrong, misses the point. Your job is to solve the problem, decide what to do and why, and execute it as a team. Then you talk through the decision in the debrief.

The rules are clear before the first dive. The instructor is always there for safety, can end a drill with a signal, and can take control of the dive at any time. Any student can call a time-out, and the dive ends calmly.

Experience dives

Then the instructor steps back.

UTD defines experience dives as dives with no new skills presented and no critical skills training. They're real dives. You and your team plan them, brief them and run them, within the course's limits.

The instructor is watching one thing: can you plan and execute a safe dive?

How are you evaluated?

UTD scores each section of the final evaluation on a five-point scale:

Score	Meaning
1	Cannot complete
2	Complete but unsafe
3	Safe but could be improved
4	Above average
5	Demonstration level

To be certified, you need at least a 3 on every section. Not the average. Every section.

If you're not there yet, your instructor can set out a UTD Path to Completion. You get a year to train and be evaluated, and the extra training may cost extra.

Let's be honest about why this matters.

The comfortable belief: I paid for the course, so I get the card.

The truth: you pay for the training. You earn the card. That's what makes the card mean something to the next team you dive with.

Why train this way?

Because emergencies don't announce themselves.

A diver who has only ever practiced a valve drill on command knows the motions. A diver who has solved a surprise valve failure, while sharing gas, while their team kept the dive under control, knows what to do. That difference is what UTD means by a thinking diver.

It's also how teams learn to work as one. Read Team Diving vs Buddy Diving for how that plays out on every dive.

Ready to be surprised?

So, when was the last time something went wrong on a dive you didn't plan for? How did you and your team handle it?

If the honest answer is "I don't know," find out in a setting built for it. Critical skills dives are a core part of Essentials of Tech.

Frequently asked questions

What is a critical skills dive?

A training dive where the instructor introduces surprise failures, such as a valve failure, an out-of-gas diver or a lost mask, and the team must solve the problem and decide whether to continue or end the dive. The failures get more complex through the course.

What is an experience dive?

Under UTD's standards, a dive with no new skills presented and no critical skills training. The instructor evaluates whether you can plan and execute a safe dive in real conditions.

How are UTD students evaluated?

Each section of the final evaluation is scored from 1 to 5. You need at least a 3, safe but could be improved, on every section to be certified.

What happens if I don't pass?

Your instructor can set out a UTD Path to Completion. You have one year to train and be evaluated, after which you'd need to repeat the course.

What are UTD's skill levels?

Level one skills are demonstrated with no surprise. Level two skills come as a surprise but on their own. Level three skills are compounded, and level four are complex and multi-compounded.