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Take your technical diving to the next level

Whether you're starting out, refining your skills, or switching to JJ-CCR, we’ve got the training, community and trips to get you there.

Expert instruction, real-world experience, and a network of divers going further.

Welcome to dive sub⁴⁰

Serious Training. Real Community. Epic Dives.

OUR COURSES

JJ-CCR Training
Open Circuit Technical
Intro to Tec

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JJ-CCR - THE 4X4 OF REBREATHERS

5 days

MOD 1 & 2

3 days

Crossover Course

Why Choose JJ-CCR?

Proven Performance, Evolved for Exploration: With 15+ years of real-world testing and continuous innovation, the JJ-CCR is built to handle the harshest diving environments.
Uncompromising Reliability & Robustness: Designed for the ultimate technical diver pushing the boundaries. The JJ-CCR is the unit you can depend on.
Advanced Electronics for Ultimate Control: Powered by state-of-the-art Shearwater electronics, delivering precise data for safer, more efficient dives.

OPEN CIRCUIT TECHNICAL

4 / 5

Days - options to Fully Qualified

1 day

Refresher & Shakedown Dives

Master Technical Diving

Progressive Training Pathway: From Intro to Tech to expedition-level dives (100m) Hypoxic Trimix.
Optimised Gas Management: Learn to carry & use multiple gas blends to safely conduct accelerated decompression, extending bottom time.
Advanced Techniques: Safely learn new technical skills to enhance your capabilities a competent technical diver.

INTRO TO TECH

1/2 days

Basics and beyond

Twinset

Rental included

Ready for Technical Diving?

Start Here: Get hands-on with twinsets, dive planning, and gas management in a structured familiarisation.
More Skills. More Control. More Confidence: Learn the fundamentals of tech diving and discover what’s possible beyond recreational limits.
Try It First: No pressure, no commitment— just a solid introduction to technical diving & deco procedures to see if technical diving is right for you.

WHY TRAIN WITH US?

Human Factors Approach

Technical diving is more than depth—it’s about confidence, competence, and control. At divesub⁴⁰, we don’t just teach skills; we develop divers who think critically, make smarter decisions, and handle real-world challenges with ease.

With expert instruction, a hands-on approach, and a strong dive community, we focus on practical experience, human factors and safety to ensure you’re not just certified—you’re truly prepared.

Whether you’re taking your first steps into technical diving, refining your skills, or transitioning to JJ-CCR, we provide the knowledge, training, and support to help you go further.