TDI Air Diluent CCR


This is the entry level certification course for divers wishing to utilize a closed circuit rebreather (CCR) for air diving. The objective of the course is to train divers in the benefits, hazards and proper procedures for diving a CCR and to develop basic CCR diving skills to a maximum depth of 30 metres / 100 feet, using air as a diluent. No decompression diving is allowed on this course



Class Duration: Minimum of 6 hours academic development and 2 hours equipment maintenance workshop. The duration of the entire course must take a minimum of 5 days.



Course Structure

Confined Water Execution 

1. Minimum of 60 minutes confined water training to a maximum of 9 metres / 30 feet 

Open Water Execution
1. Equipment configuration session, confined water session, and 50 metre fully-equipped CCR diver surface tow must be completed prior
   to open water training dives
2. Minimum of 420 minutes open water training, to be completed over a minimum of 7 dives with a gradual increase in depth each day

   to a maximum of 30 metres / 100 feet


Student Prerequisites

1. Minimum age 18 

2. Provide proof of 20 logged open water dives. If completing a unit crossover, provide proof of 10 logged CCR dives in the last 12


3. Provide proof as a TDI Nitrox Diver or equivalent from agencies recognized by TDI* 

4. If the rebreather is a TDI approved sidemount rebreather, the student must hold the TDI Sidemount Diver certification or

   equivalent, provide proof of 10 logged sidemount dives, and any additional requirements the sidemount rebreather manufacturer may

Note: Nitrox diver and/or Advanced Nitrox diver may be combined with this



Required Equipment:  The following equipment is required for each student

  1. A complete closed circuit rebreather . Any modifications to the unit must be approved by the manufacturer 
  2. Minimum of 1 CCR dive computer, or bottom timer and depth gauge 
  3. Mask, fins and a suitable line-cutting device 
  4. Slate and pencil 
  5. Reel with a minimum of 40 metres / 130 feet of line 
  6. Lift-bag / delayed surface marker buoy (DSMB) with adequate lift and size for the dive environment 
  7. Exposure suit appropriate for the open water environment where training will be conducted 
  8. Access to an oxygen analyzer 
  9. Appropriate weight 
  10. Bailout gas supply (and an externally carried redundant air source)

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.

Total  Cost: $1800 (Includes E-learring and certification card upon course completion; Does not including required gear)

Rental of a rebreather is available upon request.

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