Learn deep diving to 100m, with hypoxic trimix
TDI Advanced Trimix Diver Course
Push the limits of technical diving with the TDI Advanced Trimix Diver course in Thailand. This elite-level program trains experienced technical divers to safely conduct deep decompression dives using helium-based gases to depths of up to 100 metres.
The TDI Advanced Trimix course represents the highest level of open circuit technical diving, combining advanced gas planning, extreme depth management, and complex decompression strategies
What Is the TDI Advanced Trimix Diver Course?
The TDI Advanced Trimix Diver course teaches divers how to plan and execute dives using normoxic and hypoxic trimix blends for deep exploration.
This course builds on your Trimix training and introduces:
- deeper diving profiles (up to 100m)
- hypoxic gas mixtures
- advanced decompression strategies
- complex gas logistics and planning
- increased risk management
At this level, diving becomes a highly calculated and controlled process.
Why Advanced Trimix Is Essential for Deep Diving
Beyond certain depths, air and basic trimix are no longer sufficient.
Challenges at Extreme Depth:
- severe nitrogen narcosis
- increased gas density (difficult breathing)
- high oxygen toxicity risk
- increased decompression stress
Benefits of Advanced Trimix:
- dramatically reduced narcosis
- lower gas density for easier breathing
- precise oxygen control at depth
- safer and more efficient deep dives
👉 Advanced Trimix is the only safe way to operate at extreme depths on open circuit.
Trimix vs Advanced Trimix – What’s the Difference?
Understanding this progression is critical.
Trimix Diver:
- moderate depths
- normoxic mixes
- manageable decompression
Advanced Trimix Diver:
- depths up to 100 metres
- hypoxic bottom gases
- long and complex decompression
- significantly higher task loading
👉 The Advanced Trimix course is where deep diving becomes truly expedition-level.
Why Take Your Advanced Trimix Course in Thailand?
Thailand offers excellent conditions for deep technical diving:
- access to deep inshore dive sites
- calm water for long decompression stops
- reliable logistics for multi-day training
- real-world deep diving environments
This allows divers to gain practical experience in realistic conditions.
What You Will Learn
The TDI Advanced Trimix course focuses on extreme depth diving and advanced decompression.
Theory Topics Include:
- gas density and work of breathing
- hypoxic gas planning
- oxygen toxicity management
- decompression theory and modelling
- High Pressure Nervous Syndrome (HPNS)
- contingency planning for deep dives
- risk management at extreme depth
Advanced Skills Developed
This is one of the most demanding diving courses available.
Skills Include:
- precise buoyancy and trim at depth
- advanced multi-gas switching
- decompression execution over long profiles
- emergency and bailout procedures
- team coordination and communication
- task management under extreme conditions
Real Challenges in Advanced Trimix Diving
At this level, diving becomes highly complex.
Divers must manage:
- extreme depth exposure
- long decompression obligations
- complex gas logistics
- high task loading
- maintaining awareness under pressure
The course is designed to build the ability to handle these safely.
Who Is This Course For?
The TDI Advanced Trimix Diver course is designed for:
- Trimix-certified divers progressing deeper
- experienced technical divers
- exploration and expedition divers
- divers preparing for CCR or extreme environments
Course Prerequisites
To enrol, you must:
- Be at least 18 years old
- Hold TDI Trimix Diver certification (or equivalent)
- Have significant technical diving experience
Course Structure
Minimum 6–8 Days
- Day 1: Advanced theory and planning
- Day 2: Skills development
- Days 3–8: Progressive deep trimix dives
Each dive increases depth, complexity, and decompression requirements.
What Comes After Advanced Trimix?
Completing the TDI Advanced Trimix course prepares you for:
- extreme exploration diving
- deep wreck expeditions
- CCR advanced mixed gas training
- expedition-level projects
This is the pinnacle of open circuit technical diving.
Why Choose Us for Your Advanced Trimix Course?
- highly experienced deep technical instructors
- real deep diving environments
- small group training
- strong focus on safety and discipline
- structured progression into advanced training
You will leave this course prepared for deep technical exploration.
Contact Us
Have questions or need help? Use the form to reach out and we will be in touch with you as quickly as possible.