The TDI Mixed Gas course (certification depends on unit/electronics used) is your next step into closed circuit rebreather diving and with the addition of helium as a diluent gas, it is your opportunity to explore a little deeper. Using the latest in technology CCR’s maximize your gas supply and provide the optimum breathing gas for any depth by maintaining a constant partial pressure of oxygen(PPO2). During the dives (minimum of 6) your TDI Instructor will teach you all the necessary skills to conduct CCR dives utilizing helium as a diluent gas and oxygen levels as low as 16 percent to a maximum depth of 60 m/200 feet. The skills include:

• Calculating off-board gas requirements
• Recovering from system failure
• Calibration of electronics
• Emergency procedures
• Removing and replacing off-board gases
• Surface marker buoy deployment

The individual TDI manuals provide comprehensive information about the units and how they operate during a dive, combined with the TDI Trimix Diver manual to complete the academic knowledge needed to conduct mixed gas CCR.