TDI Advanced Mixed Gas CCR is the highest closed-circuit rebreather diver course that TDI offers. The official TDI page describes it as training divers to use the full capabilities of a CCR to a maximum depth of 100 metres/330 feet, with custom mixed gas as the diluent. This is capstone-level training where deep planning, decompression control, bailout strategy, gas analysis, and team procedures must all be handled with precision.
The course is for certified TDI Mixed Gas CCR Divers, or equivalents, who want to extend their depth limitations. TDI lists minimum age 18, a certified CCR Mixed Gas Diluent rating, and verified logs of at least 100 rebreather hours over at least 100 dives, with a minimum of 50 hours and 50 dives on the specific unit. The page also requires a substantial percentage of dives deeper than 30 metres/100 feet.
Training covers advanced gas physiology, hypoxia, helium and nitrogen tracking, HPNS, custom tables, constant PPO2 planning, low-oxygen diluent, fuel cells, loop configuration, preflight checklists, lift bag deployment, multiple bailout cylinders, team bailout, system failure recovery, manual control, and adverse-condition decision making. In High Springs, Florida, it is a serious pathway for divers preparing for major deep CCR projects. Successful students should leave with a more rigorous approach to full mixed-gas CCR diving.
Halcyon
Halcyon
