JJ-CCR Courses

three rebreather divers on a JJ-CCR course in Thailand

Courses on the JJ-CCR

At Tech Dive Asia we offer the full range of courses on the JJ-CCR including:

Tech Dive Asia is Thailands most popular JJ-CCR Dealer providing both new and used units for sale. If you are not ready to buy a unit before your JJ-CCR course we have well maintained student units for rent.

MOD1 JJ-CCR training

The TDI JJ CCR Course Module 1 is the entry level certification course from TDI for divers wishing to dive a JJ-CCR. The main objective of the course is to train divers in the benefits and proper procedures for diving a CCR and to develop basic CCR diving skills while avoiding the associated hazards to become a safe rebreather diver. At Tech Dive Asia we not only teach courses on the JJ-CCR under the TDI training agency we are also authorised to teach under PADI and RAID.

TDI MOD1 is split into three levels. Air Diluent to 30m | Air Diluent / Deco to 40m | Helitrox

The Air Diluent CCR Course introduces you to the world of rebreather diving, offering your first truly silent underwater experience. Using advanced technology, closed circuit rebreathers optimise your Nitrox supply by maintaining a constant partial pressure of oxygen (PPO₂), ensuring you breathe the most efficient gas mixture at any depth within recreational limits.

This course is designed to equip you with the knowledge, skills, and techniques required to dive safely and responsibly using the JJ-CCR rebreather system within no-decompression limits. Over a minimum of seven training dives, your TDI Instructor will guide you through all essential skills to safely operate a CCR at depths up to 30 metres (100 feet).

The TDI CCR manual covers general rebreather diving concepts, what to expect during your dives, and standard problem-solving procedures. It is crucial to study the unit-specific JJ-CCR manual before beginning training to ensure familiarity with the equipment. Throughout the course, you will gain confidence in gas management, buoyancy control, and emergency protocols needed for safe CCR dives to 30 metres.

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Air Diluent Deco

Have you ever reached the end of a spectacular deep dive and wished you could stay longer? The JJ-CCR Air Diluent Decompression Procedures Course is designed to make that possible. Building upon the Air Diluent CCR course, this training allows you to extend your dive times beyond standard no-decompression limits, enabling dives to depths of up to 40 metres.

While your dive duration will be governed by the amount of decompression you’re prepared to complete, you’re no longer restricted by traditional bottom time limitations. This course will transform your diving perspective, allowing you to dive deeper using air diluent while learning to plan decompression stops effectively and apply advanced techniques for longer dives.

As one of the most popular CCR courses offered by TDI, this is the second certification level for divers looking to use closed circuit rebreathers for air or helitrox decompression dives. It is ideal for technical divers ready to transition from open circuit to rebreather diving.

Throughout this course, you will gain a comprehensive understanding of the benefits, risks, and correct procedures for using a CCR for decompression dives with air as the bottom gas. You will develop advanced CCR diving skills to conduct formal decompression dives safely and confidently to a maximum depth of 40 metres (150 feet).

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Helitrox

This course serves as the third entry-level certification for divers aiming to use CCRs with a Helitrox diluent for mixed gas diving. Its primary goal is to equip divers with the knowledge of the advantages, risks, and correct techniques for diving with a CCR while developing essential skills for safe and effective mixed gas dives.

During this training, you will learn to conduct formal decompression dives to depths of up to 45 metres (150 feet) using a diluent blend of air, nitrox, and helium. Students can use diluent and bailout mixes containing up to 35% helium (±5%) with a minimum of 21% oxygen, and oxygen concentrations up to 100% are allowed for decompression.

Diving deep on a rebreather is one thing, but maintaining mental clarity throughout the dive is another. Adding helium to your breathing mix significantly reduces nitrogen narcosis and work of breathing, making deep dives safer and far more.

Closed circuit rebreathers make trimix diving more accessible and cost-effective.

This course is designed for experienced divers who are comfortable conducting extended decompression dives and are looking to minimise narcosis exposure during deeper technical dives while building advanced CCR diving skills for Helitrox use at depths up to 45 metres.

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congratulating Helitrox student on JJ-CCR course

MOD 1 – Which JJ-CCR course will I do?

Typically the following applies:

  • MOD1 Air Diluent: No previous rebreather experience. No previous technical diving experience.
  • MOD1 Air Diluent Deco: Either Previous decompression diving or CCR diving experience.
  • Helitrox: Previous Extended Range / Trimix Technical diving experience or CCR decompression experience.

Contact us for more information about your specific requirements.

Helitrox Upgrade

This Helitrox Upgrade course is designed for CCR MOD 1 certified divers who want to advance into mixed gas diving using a Helitrox diluent. The course focuses on building your understanding of the benefits, risks, and correct procedures for using a closed circuit rebreather with helium-enriched mixes.

Throughout the training, you will develop essential skills to safely conduct formal decompression dives to a maximum depth of 45 metres (150 feet), using diluents that combine air, nitrox, and helium. Students are permitted to use diluent and bailout gases with up to 35% helium (±5%) and no less than 20% oxygen. Oxygen concentrations of up to 100% are allowed for decompression.

Students completing the MOD1 Air Diluent Deco course may go on to directly enter the Helitrox upgrade if all prerequisite performance requirements have been met.

The CCR MOD 1 Helitrox Upgrade course is currently offered on an on-demand basis. For details about upcoming training dates and availability, please contact our training team directly.

JJ-CCR Crosover Course

All TDI closed circuit rebreather courses are specific to individual rebreather units. The CCR Unit Crossover Course enables certified rebreather divers to transition to operating a different rebreather model at their current certification level. This course is designed to train divers to use a new CCR unit at the same user level as their existing qualification.

Divers holding certifications such as Air Diluent No-Decompression (30 m), Air Diluent Decompression (40 m), or Helitrox (45 m) can cross over to equivalent levels on another rebreather. Completion of an initial crossover is required before progressing to deeper CCR courses such as the 60 m or 100 m Trimix programs.

Compared to your original rebreather training, this transition involves significantly less workload. Typically, the crossover can be completed within two to three days. During the course, you will review fundamental rebreather diving concepts and develop proficiency in the operation, skills, and maintenance procedures specific to the new unit.

It is important to note that this course aligns with your current certification level and does not extend your qualification depth or upgrade your certification.

Next JJ-CCR Course

MOD 2 TDI CCR Mixed Gas Diver course

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