Technical Rebreather Training in Thailand
Advance beyond no-decompression limits and learn professional CCR decompression diving procedures to 40 metres. Train with experienced technical diving instructors in Phuket using unit-specific TDI MOD 1 rebreather training focused on safety, precision and real-world technical diving skills.
TDI MOD 1 CCR Air Diluent Decompression Diver Course
Advance your technical diving skills with the TDI MOD 1 CCR Air Diluent Deco Procedures Diver Course in Phuket, Thailand. Designed for experienced divers ready to move beyond no-decompression limits, this course introduces formal decompression diving using a closed circuit rebreather (CCR) to a maximum depth of 40 metres (130 feet).
The TDI CCR Air Diluent Deco course is the next step in professional-level rebreather training, teaching divers how to safely plan and execute staged decompression dives while using air diluent and bailout systems.
With longer bottom times, reduced gas consumption, and the silent underwater experience only a rebreather can provide, this course opens the door to deeper technical diving adventures.
CCR Air Diluent Deco Course – 40 Metres
This TDI MOD 1 Air Diluent Deco course in Phuket is a unit-specific decompression rebreather certification program focused on advanced CCR diving procedures, decompression theory, and technical dive execution.
During the course, divers develop the skills and confidence needed to conduct decompression dives safely while managing additional bailout and decompression cylinders.
Training combines classroom sessions, practical workshops, confined water training, and open water boat dives in real diving conditions around Phuket.
What Is the TDI Air Diluent Deco Course?
The TDI CCR Air Diluent Decompression Procedures Diver Course is the second-level certification for divers wishing to use a closed circuit rebreather for decompression air diving.
The objective of the course is to train divers in:
- Benefits and limitations of CCR diving
- Proper decompression procedures
- Technical dive planning
- Emergency management
- Advanced buoyancy and loop control
- Safe operation of CCR systems during decompression dives
Upon successful completion, divers may independently conduct decompression diving activities using the CCR unit they were trained on, without direct instructor supervision, within certification limits.
Why Train on CCR for Decompression Diving?
Closed circuit rebreathers have become one of the fastest-growing areas of technical diving due to their efficiency, flexibility and performance advantages.
Compared with open circuit scuba systems, CCR diving offers:
- Longer bottom times
- Reduced gas consumption
- Optimised breathing gas throughout the dive
- Reduced decompression stress
- Quiet diving with minimal bubbles
- Better marine life interaction
- Increased efficiency during technical dives
- Improved gas logistics for deeper exploration
Technical divers worldwide increasingly use CCR systems for wreck diving, cave diving, exploration diving and decompression diving because of these operational advantages.
Who Is This Course For?
This course is ideal for:
- Certified CCR divers progressing into decompression diving
- Technical divers transitioning from open circuit to CCR
- Experienced divers wanting longer and deeper dives
- Underwater photographers and explorers seeking extended bottom times
- Divers preparing for advanced mixed gas or wreck training
- Technical divers planning future expedition diving
Course Prerequisites
To enrol in the TDI MOD 1 CCR Air Diluent Decompression Procedures Course, students must meet ONE of the following requirements:
Option 1
- Minimum 100 logged dives
- Proof of TDI Advanced Nitrox Diver and TDI Deco Procedures Diver certifications, or equivalent from a recognised agency
OR Option 2
- Certified TDI CCR Air Diluent Diver or equivalent
- Minimum 30 dives and 30 hours on the specific CCR unit
- Minimum six months of CCR diving experience
Course Schedule
Minimum 5 Days
- Day 1 Classroom sessions and workshop training
- Day 2 Workshop sessions and confined water/pool training
- Day 3 – 5 Three open water boat dives
Additional Training Recommendations
As with all technical diving courses, we strongly recommend allowing an additional day in your travel schedule.
Weather conditions, logistics or individual skill development may require extra training time. Many divers also choose to complete additional dives with their instructor to further refine decompression procedures and CCR skills.
What You Will Learn
The TDI MOD 1 CCR Course provides extensive technical training in both theory and practical CCR decompression diving.
Key areas covered include:
- Setup and configuration of the CCR unit
- Unit-specific maintenance and servicing
- Loop volume management
- Electronics calibration procedures
- Oxygen monitoring and CNS tracking
- Buoyancy control using loop management techniques
- Dive planning for decompression profiles
- Bailout gas management
- Use of decompression and bailout cylinders
- Emergency procedures and failure management
- CCR decompression diving protocols
- Dive computer and decompression software usage
- Surface marker buoy (SMB) deployment
- Safe ascent and decompression procedures
- Post-dive cleaning and maintenance
Students will also cover:
- History and evolution of rebreathers
- Open circuit vs closed circuit vs semi-closed systems
- Gas physiology and oxygen exposure management
- Proper scrubber packing techniques
- Dive tables and decompression planning
- Pre-dive safety checks and checklists
- Electronic and manual system maintenance
- Proper execution of dives within planned limits
To achieve certification, students must successfully complete the TDI CCR Air Diluent examination with a minimum passing score of 80%.
Unit-Specific CCR Training
This TDI MOD 1 course is conducted as a unit-specific certification program. Training is completed on the exact rebreather model you intend to dive after certification.
If this is your first CCR course and you already hold TDI Advanced Nitrox and Deco Procedures certifications, you will require the TDI Generic CCR eLearning materials.
Existing TDI CCR divers progressing to MOD 1 typically do not require additional learning materials.
👉 Find out more about the list of rebreathers the MOD 1 Air Diluent Deco course is available on
Bailout and Decompression Procedures
A major focus of the MOD 1 CCR course is developing the ability to safely manage decompression diving scenarios using proper bailout planning and emergency procedures.
Students learn:
- Bailout gas calculations
- Gas matching procedures
- Emergency ascent protocols
- Decompression gas switching
- Lost gas contingency planning
- Failure management procedures
- Oxygen toxicity monitoring
- Hypercapnia awareness
- CCR rescue procedures
- Team communication and positioning
The course places strong emphasis on procedural discipline and safe decision-making under realistic diving conditions.
Open Water Training in Phuket
Phuket provides excellent conditions for technical rebreather training with warm water, deep dive sites and boat access to a wide range of environments suitable for CCR decompression procedures training.
Training dives may include:
- Deep reef environments
- Wreck diving sites
- Blue water decompression dives
- Real-world technical diving scenarios
Divers benefit from calm tropical conditions while building experience on their rebreather system.
Why Train in Thailand?
Thailand has become one of Southeast Asia’s leading destinations for technical diving and rebreather training.
Advantages include:
- Warm water year-round
- Excellent diving logistics
- Access to deep dive sites
- Experienced technical instructors
- Lower operational costs compared to Europe or North America
- Strong technical diving community
- Easy international travel access
Phuket is particularly well suited for CCR training because of its combination of dive site variety, technical infrastructure and reliable boating operations.
Why Choose Tech Dive Asia?
Tech Dive Asia specialises in technical diving and CCR training in Thailand.
Unlike many recreational dive centres that occasionally teach technical courses, our focus is technical diving progression, exploration and advanced diver development.
What Makes Our Training Different?
- Experienced Technical Instructors. Our instructors actively dive CCR systems in real-world environments including wrecks, caves and decompression diving projects.
- Small Team Training. We maintain low student-to-instructor ratios to ensure personalised coaching and safer learning environments.
- Real Technical Diving Procedures. Training focuses on practical CCR diving procedures used in real technical and exploration diving situations.
- Progressive Skill Development. Our courses emphasise precision buoyancy, situational awareness, equipment familiarity and procedural discipline.
- Unit-Specific Expertise. We provide structured training on specific CCR units to ensure divers fully understand the system they will use after certification.
Continuing Education After MOD 1
Successful graduates may continue their technical diving progression by enrolling in:
- TDI Mixed Gas CCR Unit-Specific Course
- TDI Advanced Wreck Diver Course
- Cave CCR Training
- Advanced Decompression Diving Programs
- Technical Exploration Diving
Rebreather Rental and Purchase Options
If you are considering purchasing a new or second-hand CCR unit, our team can assist with equipment selection, international shipping to Thailand and setup before your course begins.
Your instructor can also provide advice on:
- Equipment costs
- Unit ownership considerations
- Maintenance requirements
- Upgrade pathways
- Potential tax benefits
For divers not yet ready to purchase a unit, “try before you buy” CCR rental options are available on selected rebreather models.
Train with Tech Dive Asia and develop the skills required for safe and efficient CCR decompression diving in Phuket, Thailand.
Whether your goal is technical wreck diving, cave exploration or advanced decompression diving, the TDI MOD 1 CCR Air Diluent Decompression Diver Course is the next major step in your technical diving progression.
Contact Us
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