Trimix
TDI Trimix Diver Course | Deep Technical Diver Training | Stuart Scuba
Are you ready to expand your depth range and take the next step in technical diver training? The TDI Trimix Diver course at Stuart Scuba is designed for serious divers who want to safely explore deeper environments while reducing the effects of narcosis.
As your diving goals grow, so does your desire to explore deeper wrecks, more advanced dive sites, and legendary underwater environments that demand greater planning, discipline, and precision. One of the biggest limiting factors in deep diving is narcosis. The TDI Trimix Diver course teaches divers how to minimize narcosis by adding helium to breathing gas, helping create a clearer, more controlled diving experience at depth.
During this course, your instructor will teach you how to plan and execute dives using trimix blends with as little as 18 percent oxygen, while diving to a maximum depth of 60 metres / 200 feet with a helium blend appropriate for the planned depth. This training is a major step forward for divers who want to push beyond conventional limits with the proper knowledge, equipment, and mindset.
At Stuart Scuba, our focus is on developing skilled, confident, and disciplined divers who are prepared for the demands of deep technical diving. This course is about far more than going deeper — it is about learning to dive deeper the right way, with sound gas planning, increased awareness, better decision-making, and refined technical execution.
Who This Course Is For
This course is ideal for divers who:
- Want to expand their depth range
- Want to reduce narcosis during deep dives
- Are motivated to explore deep wrecks, advanced dive sites, and challenging underwater environments
- Are ready to build the knowledge and discipline required for deeper technical diving
- Want to learn how helium can be used to create safer, clearer, and more efficient dives at depth
What You Can Expect to Learn
In Stuart Scuba’s TDI Trimix Diver course, you will learn how to:
- Understand the role of helium in reducing narcosis during deep dives
- Plan and execute dives using trimix
- Use breathing gas mixes containing as little as 18 percent oxygen
- Dive to a maximum depth of 60 metres / 200 feet
- Choose an appropriate helium blend based on planned depth and dive objectives
- Build the awareness, control, and discipline needed for deeper technical diving
What’s In It for You
By taking this course, you will:
- Expand your ability to safely dive deeper
- Reduce the effects of narcosis on deep dives
- Gain a better understanding of advanced gas planning
- Build confidence for deeper wreck and technical exploration
- Develop stronger technical diving skills and judgment
- Take an important step forward in your technical diver progression
Why Train with Stuart Scuba
At Stuart Scuba, we believe technical diver training should be thorough, skill-driven, and built on strong foundations. Our TDI Trimix Diver course helps divers move into deeper exploration with the training, structure, and confidence needed to dive with precision and purpose.
If your next goal is deeper exploration with greater clarity and control, TDI Trimix Diver at Stuart Scuba may be your next step.
Optional Short Page Summary
Take your technical diving deeper with Stuart Scuba’s TDI Trimix Diver course. Learn how helium-based breathing gas can help reduce narcosis, extend your depth range, and prepare you to plan and execute dives to 60 metres / 200 feet with greater safety, clarity, and confidence.
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Availability: Contact us for booking information
Who this course is for:
- The certified Advanced Nitrox and Decompression Procedures diver looking to:
- Extend their depth range
- Reduce narcosis for all deep dives
- Advance their technical diving education
Course prerequisites:
- Minimum age 18
- Minimum certification of TDI Advanced Nitrox AND Decompression Procedures Diver, or equivalent
- Proof of 100 logged dives
What you can expect to learn:
- Advanced decompression dive planning including:
- Gas planning based on equivalent narcotic depths, nitrogen and helium absorption and elimination, CNS and OUT limits, Isobaric Counter diffusion, volume requirements, etc.
- Decompression gas choices
- Tables vs. personal dive computers
- Emergency and contingency planning (equipment failure, omitted decompression, etc)
- Decompression diving procedures
- Equipment selection
- Pre-dive checks and drills
- Stress analysis and mitigation
- Following a decompression schedule
- Gas switching
- Team awareness and communication
- SMB/lift bag deployment
- Proper trim, buoyancy and finning techniques
- Management of multiple decompression/stage cylinders
- Emergency procedures (equipment failures, catastrophic gas loss, omitted decompression, navigational errors, injured/unconscious diver, etc)
- Equipment considerations, cylinder labeling, analyzing trimix nitrox and mixes, and gas blending procedures
What’s in it for you?
- Ability to conduct technical diving activities using custom trimix mixtures without direct supervision provided:
- The diving activities approximate those of training
- The areas of activities approximate those of training
- Environmental conditions approximate those of training
- Ability to enroll in TDI Advanced Wreck and TDI Advanced Trimix courses
TDI Trimix Diver minimum certification requirements:
- Satisfactorily complete the TDI Trimix Diver course written examination
- Complete all open water requirements safely and efficiently
- Demonstrate mature, sound judgment concerning dive planning and execution
