TDI JJ-CCR Level 1: Air Diluent Diver

dptscuba JJ-CCR Similan Islands ThailandThe JJ-CCR Level 1 course is the first step into closed circuit rebreather diving on your JJ-CCR. You will enter the world of silent diving and extend your diving limits using the latest rebreather technology. This will enable you to maximise your gas supply and provide the optimum breathing gas at any depth, you now have a nitrox blending machine strapped to your back!

During this course, you will learn all of the necessary skills to conduct no decompression CCR dives to a maximum depth of 30 metres using air diluent.


  • Minimum age 18
  • Provide proof of 20 logged dives
  • Provide proof as a TDI Nitrox Diver or equivalent from agencies recognized by TDI

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 20m)
  • Day 4: 2 boat dives (max 30m)
  • Day 5: 1/2 boat dives as required. (max 30m)

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
  • 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 no-decompression dives on your JJ-CCR to a maximum depth of 30m 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 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: $2250 AUD