TDI CCR Mixed Gas (60m)

TDI CCR Mixed Gas (60m)

As a TDI CCR Air Diluent Decompression or Helitrox Diluent Decompression Diver, the TDI Mixed Gas CCR Diver course is your next step into closed circuit rebreather diving, 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 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 metres.

How do I begin?

You start with the training materials, if you did not get them with a previous course, ie TDI CCR online code/TDI Diving Rebreathers manual. You also need to have a copy of the manufacturer's manual for the specific unit.

What's in the course?

The TDI CCR Mixed Gas Diver course takes an in-depth look at all of the following and more:

  • History and evolution of rebreathers
  • Comparison of Open Circuit (OC), closed circuit, and Semi-closed Circuit Rebreather (SCR) systems noting the pros and cons of each
  • Practical mechanics of the system
  • Gas physiology
  • Proper scrubber packing: in accordance with manufacturers recommendation
  • Electronic or manual systems design and maintenance
  • Dive tables
  • Dive computers
  • Dive planning
  • Emergency procedures
  • Dive checklists
  • Pre-dive checks

How long does it take?

The TDI CCR mix Gas Diluent course takes 5 days and includes 360 minutes of CCR diving over a minimum of 6 dives.

What qualifications do I need?

The student must have 50 logged hours on the unit over a minimum of 50 dives and hold a TDI CCR Air Diluent Decompression Procedures/TDI CCR Helitrox Diluent Decompression Procedures qualification or equivalent.

The minimum age of enrolment on this programme is 18yrs.

You will need to fill out a self certification medical statement. If you have any medical conditions you think may prevent you from scuba diving please feel free to contact us and we will try to be of assistance.

What's next?

Celebrate your TDI CCR Mixed Gas qualification by spending the rest of the week exploring the Zenobia wreck to the bottom, and start logging your hours for the TDI CCR Advanced Mixed gas certification.


TDI CCR Mixed Gas course is 7 dives and costs €1000.00 including gases, cylinders and boat (manual/online code, certification and unit hire is not included).