Technical Diving • Advanced Wreck Training • Exploration
Train for the Most Demanding Dives on Earth
Advanced wreck, decompression, trimix, and technical diving training with one of the world’s most respected wreck explorers. Built for divers who want more than a certification… and want the mindset, discipline, and judgment to execute serious dives the right way.
Instruction Since
1986
Decades of technical and advanced diver training.
Depth Rating100 M
Trimix and advanced technical certification depth.
SpecialtyWreck
Exploration, planning, penetration, and decompression discipline.
ApproachElite
Small-group training focused on precision and execution.
Why train here
Real exploration experience… translated into serious diver training
Most divers collect certifications. John trains divers to think clearly, plan correctly, and execute with discipline in demanding environments. This is advanced training for divers who want a higher standard.
Real-World Wreck Experience
Training shaped by actual exploration… not theory alone. Students learn from decades spent diving complex, overhead, and high-consequence environments.
Procedural Discipline
Trim, buoyancy, propulsion, team awareness, planning, gas management, and decision-making are built into every course. The goal is confidence through precision.
Focused, High-Level Instruction
Designed for divers ready to progress with intention. Smaller classes and direct coaching keep the training personal, practical, and demanding in the best way.
Training programs
Structured paths for advanced divers
Organize the existing course offerings into a few cleaner buckets so the homepage is easier to scan and stronger as a conversion page.
Advanced Wreck Diving
For divers ready to sharpen penetration techniques, situational awareness, wreck protocols, and execution under pressure.
- Advanced Wreck for Certified Deco Divers
- Combo Advanced Wreck pathways
- Technical wreck progression
Decompression & Extended Range
Build the planning habits and in-water discipline needed for staged decompression and deeper technical profiles.
- Intro to Tech
- Advanced Nitrox
- Extended Range combinations
Helitrox & Trimix
Move beyond air and nitrox with appropriate gas planning, narcosis management, and team execution for serious technical dives.
- Helitrox combinations
- Basic Trimix + Advanced Wreck
- Depth-focused technical progression
Intro to Tech & Advanced Nitrox
This is a course specifically designed for recreational divers who want to become technical divers but have little to no experience using twin cylinders with a backplate and wing.
- Perfect First Step
- Learn the basics of tech diving before diving deeper
- View program details →
About John
One of the world’s most accomplished wreck divers
John Chatterton’s reputation was built through exploration, deep technical diving, and decades of instruction. He brings a rare combination of real expedition-level experience and practical teaching ability… which makes this site feel less like a generic training catalog and more like an opportunity to learn from someone who has genuinely done the work.
Rather than leading with a long wall of credentials, this section gives visitors a concise reason to trust him, then encourages them to go deeper into the full bio, achievements, media, and history.
- Technical diving instruction since 1986
- Advanced wreck, cave, trimix, and rebreather qualifications
- Commercial diver training and extensive exploration history
- Authority and credibility that supports premium training