TDI JJ-CCR Level 2: Air Diluent Decompression Diver

The JJ-CCR Level 2 course is for open circuit technical divers looking to cross over to the JJ-CCR, or JJ-CCR Level 1 divers looking to move into decompression diving on their JJ-CCR. During this course, you will learn all of the necessary skills to conduct decompression CCR dives to a maximum depth of 45 metres using air diluent.


  • 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


  • Minimum age 18
  • TDI JJ-CCR Air Diluent CCR Diver certified or equivalent
  • 30 hours on the CCR unit
  • Six months CCR diving experience

Course Duration:

  • 5 days minimum
  • Day 1: Theory/Unit workshop & confined water skills session
  • Day 2: Shore based diving & skill development (max 12m)
  • Day 3: 2 boat dives (max 30m)
  • Day 4: 2 boat dives (max 45m)
  • Day 5: 1/2 boat dives as required. (max 45m)

Course Content:

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
  • Decompression CCR Dive planning
  • Emergency procedures
  • Dive checklists
  • Predive checks

Training and certification:

Upon successful completion of this course, you will be able to plan and execute decompression dives on your JJ-CCR to a maximum depth of 45m using air as a diluent so long as:

  • The diving activities approximate those of training
  • The areas of activities approximate those of training
  • Environmental conditions approximate those of training

As with all courses at DPT Scuba, training is purchased, but certification is earned. This means you must meet ALL the required skills & standards before you will receive a certification card. Additional training to meet these requirements will incur additional costs.

Minimum requirements:

  • Satisfactorily complete the TDI CCR Air Diluent Decompression examination with a passing score of 80%, followed by 100% remediation by the Instructor
  • Complete all open water requirements efficiently
  • Demonstrate mature and sound judgment concerning dive planning and execution
  • Course must be completed within 6 weeks from the starting date
  • Complete a refresher course following a period of inactivity greater than 6 months following the course

For a complete list of skills and standards please visit the TDI CCR Air Diluent Decompression Procedures Diver Page.

How to enroll in this course?

  • Use the contact form to get in touch and we will discuss your training needs and diving goals.
  • Complete the DPT Scuba student registration form and return via email to DPT Scuba
  • Organise a course schedule with DPT Scuba
  • Pay your 20% non-refundable deposit and start your e-Learning online theory.

Cost: $2500 AUD