TDI CCR Air Diluent Decompression (45m)

TDI CCR Air Diluent Decompression (45m)

Are you an open circuit technical diver (ie TDI Decompression Procedures Diver or equivalent) looking to cross over to the "silent" side? Or maybe you are a CCR Air Diluent Diver looking to progress to the next level? Either way, TDI's CCR Air Diluent Decompression Course is the next step.

Using the latest technology in CCR's can maximize your gas supply and provide an optimum breathing gas for any depth by maintaining a constant partial pressure of oxygen. Like having a blending station on your back, a CCR is the ultimate tool for technical divers.

During this course, your TDI Instructor will teach you all of the necessary skills to conduct decompression CCR dives to a maximum depth of 45 metres using air diluent.

How do I begin?

You start with the training materials, if you did not get them with a 30m course. We will provide you with and TDI CCR online code for the Megaladon, Pathfinder and SF2 courses and the TDI manual for APD's Inspiration and Evolution units so you can do all your studying at home before you come to the dive centre. You also need to have a copy of the manufacturer's manual for the specific unit.

What's in the course?

The TDI CCR Air Diluent Decompression 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 Air Diluent course takes 5 days and includes 7 dives.

What qualifications do I need?

The TDI Advanced Nitrox and Decompression Procedures Diver (or equivalent) is the pre-requisite for this course along with proof of 50 logged open water dives. (If the rebreather is a TDI approved sidemount rebreather, the student must hold the TDI Sidemount Diver certification or equivalent and provide proof of 10 logged sidemount dives)


Be a TDI CCR Air Diluent Diver on the specific unit with 30 hours logged hours on the specified unit and minimum 6 months CCR diving experience.

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 qualification by spending the rest of the week diving the Zenobia wreck to the bottom, to start logging your hours for the TDI CCR Mixed Gas certification.


TDI CCR Air Diluent Decompression course is 7 dives and costs €850.00 including gases, cylinders and transport (manual/online code, certification and unit hire is not included).