There are few evolutions at Navy SEAL BUD/S training that scare candidates more than Pool Comp.
You hear the stories:
air regulators ripped out
masks flooded
hoses tied in knots
Instructors thrashing your gear underwater
panic attacks
guys bolting for the surface
Most candidates are nervous before they ever step into the pool.
And they should be.
Pool Comp in Second Phase is designed to test one thing above all else:
Can you stay calm when your brain is screaming at you to panic?
That is the real test.
I went through Pool Comp twice at BUD/S in Coronado. It was one of the most stressful evolutions in training. But I also learned something important:
The candidates who passed were not always the best swimmers.
They were the calmest men underwater.
Dive Phase is less about brute strength and more about confidence, composure, and mental control under stress.
What Is BUD/S Pool Comp?
Pool Comp (Pool Competency) happens during Dive Phase at United States Navy SEALs BUD/S training in Coronado. It is a series of test to make sure that you are competent in the water in high stress events.
Test #1: Treading Water with Full Scuba Tanks
5 minutes with hands out of water. Scuba tanks are full of air. This is a highly aerobic event as you relying on your leg strength to keep you afloat. My legs were burning during this test. It was very difficult for me as I used egg beater movement with my fins.
Test #2: Dive Gear Stress Test
Candidates wear SCUBA gear underwater while instructors:
twist hoses
shut off air
remove regulators
flood masks
simulate equipment malfunctions
create chaos underwater
Your job is to:
stay calm
fix the problem
recover your gear
continue breathing normally
If you panic, you fail.
And panic underwater spreads fast.
That is why this evolution has ended careers for many otherwise strong candidates.
The Biggest Mistake Candidates Make
Panic.
That is it.
Not lack of strength.
Not lack of cardio.
Not lack of toughness.
Panic destroys people underwater.
The moment your breathing speeds up:
oxygen demand spikes
thinking becomes irrational
movements become sloppy
confidence disappears
Then candidates rush for the surface.
Pool Comp rewards slow thinking under pressure.
The instructors WANT chaos.
They want to see whether you can remain composed while uncomfortable.
Relax Your Mind Before You Relax Your Body
Most people try to “muscle through” Pool Comp.
Wrong answer.
The harder you fight underwater, the worse things become.
The key is controlled breathing and calm problem solving.
Before each evolution:
slow your breathing
lower your heart rate
stay mentally present
focus only on the next task
Do not think:
“What if I fail?”
“What if I black out?”
“What if I quit?”
Focus only on the immediate problem in front of you.
One task at a time.
“If you panic—you’re done.”
Water Confidence Matters More Than Swimming Speed
A lot of future candidates obsess over PST swim times.
Yes, your swim times matter.
But Pool Comp is different.
You need:
comfort underwater
breath control
composure
confidence in the water
That comes from time in the pool.
You cannot fake water confidence.
The best preparation includes:
fin swimming
treading water
underwater knot tying
mask clearing
buddy breathing drills
underwater recovery drills
The more normal water stress becomes, the calmer you stay during Pool Comp.
Tip #3: Practice Treading Water Until It Becomes Automatic
At BUD/S you will spend a massive amount of time in the water.
If treading water exhausts you, you are already behind.
You should be comfortable treading water for long periods using fins. When I failed out of BUDS the first time for failing a dive physics test – I had already passed pool comp. I knew how hard it was and I immediately went back to work and signed up for a local diving course in Coronado. I went with a buddy of mine to a local pool and had a dive instructor go through the whole test again. We treaded water with fins and underwater knot tying. We really learned a lot jumping back on the horse after failure in BUDS.
When I was treading water with my hands out of the water, I just tried to keep my breathing calm and relax my legs. This helped me a lot as earlier I was burning myself out by treading too hard and being stiff. Relaxing helped me to tread water for much longer.
One of the best drills:
tread water for time
hands above surface
slow relaxed kicks
focus on staying calm
The goal is efficiency—not thrashing. Make sure you do any drills with a swim buddy near you in the water.
You must spend the time and do the hard work with treading-water drills build confidence, leg endurance, and comfort under stress.
Tip #4: Learn Basic Diving Before BUD/S
One huge advantage?
Getting scuba certified before you enlist.
Many candidates show up with zero diving experience.
That adds unnecessary stress.
A civilian dive certification helps you learn:
regulator recovery
mask clearing
underwater calmness
breathing control
buoyancy awareness
That familiarity lowers anxiety significantly during Dive Phase.
You do not need to become a professional diver.
But basic comfort underwater helps tremendously.
Tip #5: Never Train Underwater Alone
This is serious.
Underwater blackout is real.
Never practice:
breath holds
underwater swims
knot tying
hypoxic drills
pool confidence drills
alone.
Always have:
a qualified swim buddy
lifeguard supervision
experienced coaching
Many athletes have died training underwater improperly.
Train smart.
No workout is worth your life.
Tip #6: Focus on Efficiency, Not Aggression
Good candidates underwater look calm.
Bad candidates look frantic.
When instructors attack your gear:
slow down
think clearly
solve one problem at a time
Fast panic movements waste oxygen.
Efficient movements conserve energy.
The instructors are watching your emotional control as much as your technical skill.
Pool Confidence Workout
Here is a safer SGPT-style water confidence session:
Warm-Up
500m easy swim
10 minutes mobility
fin warm-up
Main Set
5 Rounds:
50m combat side stroke
10 pushups
30-second tread water
Confidence Work
WITH TRAINED SUPERVISION ONLY:
mask clearing
shallow regulator recovery
bobbing drills
calm breathing drills
Finisher
500m easy cooldown swim
Train consistency.
Not ego.
Mental Toughness Underwater
Pool Comp is really about emotional control.
The same lesson applies everywhere in life:
business
relationships
endurance events
leadership
combat
hard workouts
Pressure exposes weakness.
The men who survive are the ones who can think clearly while uncomfortable.
That is the real lesson of Dive Phase.
Final Thoughts
BUD/S Pool Comp is hard.
Very hard.
But it is survivable if you prepare correctly.
Do not train reckless.
Do not panic.
Do not overcomplicate it.
Build:
water confidence
calm breathing
underwater composure
trust in yourself
And remember:
The water does not care how tough you think you are.
It only rewards calm.
Stay relaxed.
Stay focused.
Stay in the fight.
About the Author:
Are you looking to achieve big goals? Do you have a big event on the horizon and you want to finish the drill?
Wanting to complete a Spartan race, GORUCK, Tough Mudder or climb a big mountain?
Get individual coaching from Navy SEAL Coach Brad McLeod. Check out SGPT coaching here:
SGPT is a proud sponsor of the Navy SEAL Foundation, the UDT/SEAL Museum Charity and Honor Flight San Diego
RELATED ARTICLES:
Navy SEAL Jeremy Debie Interview
Navy SEAL Recommended Swim Fins
How Did You Know You Wanted to Become a Navy SEAL?