Air Diluent Deco CCR

Are you an open circuit technical diver 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/150 feet using air diluent.

What you can expect to learn

What you can expect to learn:

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
  • Predive checks

Course Equipment Requirements

The following equipment is required:

  • A complete closed circuit rebreather. Any modifications to the unit must be approved by the manufacturer
  • Minimum of 1 CCR dive computer and 1 backup OC/CCR computer for bailout in event of system failure
  • Mask, fins and a suitable line-cutting device
  • Slate and pencil
  • Reel with a minimum of 50 metres / 165 feet of line
  • Lift bag / delayed surface marker buoy (DSMB) with adequate lift and size for the dive environmentand a backup. Required for open water environments only
  • Exposure suit appropriate for the open water environment where training will be conducted
  • Access to an oxygen analyzer
  • Appropriate weight
  • Bailout gas supply cylinder with a minimum capacity of 5.7 litres / 40 cu ft air or nitrox may be used

Note: The instructor and any certified assistant will also carry a bailout gas supply during all open water sessions. This redundant gas source must be greater than the instructor and any certified assistant’s bailout requirements.

Course Prerequisites

  • Minimum age 18
  • Provide proof of 50 logged dives
  • Provide proof of TDI Advanced Nitrox Diver and Deco Procedures Diver or equivalent from agencies recognized by TDI
  • 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


  • Minimum age 18
  • TDI Air Diluent CCR Diver certified or equivalent
  • 30 hours on the CCR unitSix months CCR diving experience

Want to know more?

Ask more questions or schedule any of these courses Email Us.