TDI CCR Helitrox Diver Course

Advanced Rebreather Decompression Training to 45 Metres

Extend your technical diving range with professional TDI CCR Helitrox training in Phuket, Thailand. Learn advanced decompression procedures using helium-based diluent mixes to reduce narcosis, improve clarity at depth and build safer technical diving skills to 45 metres

TDI CCR Helitrox Diver Course – Phuket, Thailand

Take your technical CCR diving to the next level with the TDI CCR Helitrox Diver course in Phuket, Thailand. Designed for experienced rebreather divers who want to safely extend their depth range while reducing narcosis, this advanced technical diving program introduces helium-based diluent diving procedures to a maximum depth of 45 metres (150 feet).

The course focuses on closed circuit rebreather (CCR) decompression diving using Helitrox diluent mixes that combine oxygen, nitrogen and helium to optimise diver performance at depth.

By reducing nitrogen narcosis and improving gas efficiency, Helitrox diving allows technical divers to maintain greater clarity, comfort and control during deeper decompression dives.

What Is the TDI CCR Helitrox Diver Course?

The TDI CCR Helitrox Diver course is an advanced decompression rebreather training program that teaches divers how to safely conduct staged decompression dives using helium-containing diluent mixtures.

This course expands upon standard air diluent CCR procedures by introducing the benefits, limitations and operational considerations of helium in closed circuit technical diving.

Training includes:

  • advanced decompression planning,
  • helium gas management,
  • bailout procedures,
  • emergency protocols,
  • and real-world CCR decompression diving skills.

Successful graduates may conduct decompression dives to 45 metres within certification limits using approved Helitrox gas mixtures.

Why Use Helitrox in CCR Diving?

One of the primary limitations of deeper air diving is nitrogen narcosis, which can impair judgement, awareness and task performance.

Adding helium to the diluent mixture reduces narcosis and improves diver performance during technical decompression dives.

Benefits of Helitrox diving include:

  • Reduced narcosis at depth
  • Improved mental clarity
  • Lower breathing resistance
  • Enhanced decompression efficiency
  • Better gas optimisation
  • Increased comfort during deeper dives
  • Improved technical task performance

Helitrox has become increasingly popular among technical divers progressing toward deeper wreck, cave and exploration diving.

What You Will Learn

During the TDI CCR Helitrox course, divers develop both theoretical knowledge and practical CCR decompression diving skills.

Core training topics include:

  • CCR dive planning
  • Decompression procedures
  • Bailout gas calculations
  • Helium gas management
  • Dive execution strategies
  • Emergency response procedures
  • Oxygen exposure management
  • Advanced buoyancy and loop control
  • Dive computer and decompression software usage
  • Surface marker buoy deployment
  • Team communication procedures

Helitrox-Specific Training Topics

In addition to standard CCR decompression procedures, the course introduces several advanced helium diving concepts.

Topics include:

  • Helium properties and considerations
  • Helium absorption and elimination
  • Advantages of helium for bottom gas
  • Advantages of hyperoxic gases for decompression
  • Hypoxia awareness and prevention
  • High Pressure Nervous Syndrome (HPNS)
  • Effects of helium on respiration
  • Thermal insulation considerations
  • Practical limitations of helium diving
  • Approved Gas Limits

Students are permitted to use:

Diluent & Bailout Mixes

  • Maximum 20% helium
  • Minimum 21% oxygen


Decompression Gas

  • Up to 100% oxygen permitted

These limits provide a controlled introduction to helium-based CCR decompression diving while maintaining conservative operational procedures.

Course Prerequisites

To enrol in the TDI CCR Helitrox Diver course, students must meet ONE of the following requirements:

Helitrox Option 1


OR Helitrox Option 2

  • Certified TDI Air Diluent CCR Diver or equivalent
  • Minimum 30 dives and 30 hours on the CCR unit
  • Minimum six months CCR diving experience

Course Duration & Options


Stand alone Course

  • Minimum 6 days

Combined Training Option

  • The Helitrox course may be combined with the TDI CCR Air Diluent Decompression Procedures course by adding an additional two days of training.

This option allows divers to progress directly through MOD 1 and Helitrox certification pathways.

Helitrox Upgrade Options – Phuket

Already certified as a TDI Air Diluent CCR Diver?

Qualified divers can complete the Helitrox decompression upgrade in Phuket in as little as 2–3 days of diving.

Upgrade prerequisites include:

  • Minimum 30 logged CCR dives
  • Minimum 30 CCR hours
  • Six months CCR diving experience

Continuing Education After Helitrox

After successful completion, divers may continue progressing toward:

Why Train CCR Helitrox in Phuket?

Phuket offers ideal conditions for advanced technical diving and CCR training.

Benefits include:

  • Warm tropical water year-round
  • Deep technical dive sites
  • Boat-based decompression diving
  • Excellent diving logistics
  • Professional technical diving infrastructure
  • Access to wrecks and advanced training environments
  • Lower training costs compared with Europe or North America

Thailand has become one of Asia’s leading destinations for professional technical diving education and rebreather training.

Why Choose Tech Dive Asia?

Tech Dive Asia specialises in technical diving and CCR education in Thailand.

Unlike recreational dive centres that occasionally offer technical courses, our focus is advanced diver development, procedural precision and real-world technical diving skills.

What Makes Our Training Different?

  • Experienced CCR Instructors. Our instructors actively dive rebreathers in decompression, wreck and exploration environments.
  • Small Team Training. Low student-to-instructor ratios ensure personalised coaching and safer technical training.
  • Real Technical Procedures. Training reflects realistic CCR diving practices used in actual technical diving operations.
  • Unit-Specific Expertise. All CCR training is completed on the exact unit divers intend to use after certification.
  • Progressive Technical Development. Courses focus on precision buoyancy, situational awareness, procedural discipline and safe decision-making.

👉  Find out more about the team of Instructors and Instructor Trainers at Tech Dive Asia

  • JJ-CCR Helitrox Diver

    I completed my JJ-CCR Helitrox Diver AN/DP Instructor course with Kevin and Claus. They are both excellent instructors and taught me a lot about technical diving. I really appreciate everything they did for me.
    邱小邱

Begin Your CCR Helitrox Training

Take the next step in your technical diving progression with professional TDI CCR Helitrox training in Phuket, Thailand.

Develop the knowledge, procedures and confidence required for deeper helium-based decompression diving with experienced technical diving instructors and real-world CCR training environments.

Contact Us

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