Take your CCR diving deeper and safer with the TDI JJ-CCR Helitrox Diver course. This program expands on your closed-circuit rebreather (CCR) training by introducing helium-based diluent gas, helping to reduce nitrogen narcosis and gas density for improved mental clarity and easier breathing at depth.
Training on the JJ-CCR, one of the most capable rebreathers available, you’ll learn how to safely plan and execute decompression dives to a maximum depth of 45 meters (150 feet) with a maximum of 10 minutes of planned decompression, using Helitrox (helium-enriched nitrox) with a maximum of 35% helium and no less than 20% oxygen.
This course covers:
✅ Benefits of helium in deep CCR diving – reducing narcosis and improving gas density for easier breathing
✅ Gas selection and management – using trimix blends with up to 35% helium and no less than 20% oxygen for decompression
✅ Advanced decompression theory – optimizing ascent profiles and gas switches
✅ CCR-specific dive planning – calculating oxygen setpoints, gradient factors, and gas reserves
✅ Emergency procedures – handling hypoxia, hyperoxia, CO₂ buildup, system failures, and bailout planning
✅ Loop volume management and buoyancy control – perfecting trim and control at depth
✅ Executing planned decompression dives – extending bottom time while maintaining safety, with a maximum of 10 minutes of required decompression
Max Depth: 45 meters / 150 feet
Max Deco: 10 minutes of planned decompression
Prerequisites (choose one pathway):
Minimum age 18
Provide proof of 50 logged dives (If completing a unit crossover, provide proof of 10 logged CCR dives in the last 12 months)
Minimum certification level of TDI Advanced Nitrox Diver, Decompression Procedures Diver, or Helitrox Diver (or equivalent from agencies recognized by TDI)
Provide proof of at least 5 logged staged decompression dives to a minimum depth of 30 meters (100 feet)
Or
Minimum age 18
TDI Air Diluent CCR Diver certification (or equivalent)
Minimum of thirty hours and thirty dives on the specific CCR unit.
Six months of CCR diving experience
Dives Included:
Minimum of 7 training dives, focusing on helium-based gas use, decompression planning, and bailout procedures
Certification Limitations:
Limited to Helitrox (maximum 35% helium, minimum 20% oxygen) as a diluent
Maximum of 10 minutes of planned decompression
Reduce narcosis and gas density risks for safer, clearer thinking at depth
Learn helium gas management and staged decompression techniques
Train on one of the most capable CCR units for deep and technical diving
Build a solid foundation for full Trimix CCR diving
Upon successful completion, you’ll earn the TDI JJ-CCR Helitrox Diver certification, qualifying you to conduct planned decompression dives to 45m with a maximum of 10 minutes of deco using Helitrox blends
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