TDI Inspiration / Evolution Mixed Gas Diluent CCR Diver

The TDI Inspiration and Evolution 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 six) your TDI Instructor will teach you all the nesscery 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 TDI Inspiration/Evolution manual provides comprehensive information about the units and how they operate during a dive, this combined with the TDI Trimix Diver manual complete the academic knowledge needed to conduct mixed gas CCR. Also available is the Inspiration/Evolution build-up check list that can be adhered to the unit case for easy reference.

What do I need to start?

  • Minimum age: 18 years
  • A minimum of 100 rebreather hours (over a minimum of 100 dives on the Inspiration)
  • TDI Trimix Diver or equivalent. The course may be combined with the rebreather course
  • Have completed the TDI Air Diluent Rebreather Course

How long will it take?

Four days with six dives (2 shallow water equipment configuration and drills practice, one being a maximum 40m air diluent dive using new configuration of equipment). If the course is to be combined with the Trimix Diver requirements then a further 2 dives must be undertaken. Only two dives are on air diluent, all others are to be mixed gas dives.

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