TDI CCR Helitrox

This is the entry level certification course for divers wishing to utilize a closed circuit rebreather (CCR) for mixed gas diving using a Helitrox diluent.

What will I do?

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 of 45 metres / 150 feet, using an air/nitrox/helium diluent for formal decompression diving. Student are permitted to utilize a diluent and bailout mix with no greater than a 20% helium content and no less than a 21% oxygen content and are permitted to use up to 100% oxygen for decompression.

What will I learn?

  • 1. History and Evolution of Rebreathers
  • 2.Comparison of Open Circuit, Closed Circuit and Semi Closed Circuit Rebreather Systems and the Benefits/Problems with Each
  • 3. Practical Mechanics of the System
  • 4. Gas Physiology
  • 5. Electro nic and Manual Systems Design and Maintenance
  • 6. Dive Tables and Computers
  • 7. Dive Planning
  • 8. Emergency Procedures
    • – Mouthpiece familiarity drills
    • – Gas shutdowns and loss of gas
    • – Broken hoses
    • – Flooded absorbent canister
    • – CO2 breakthrough
    • – Semi-closed mode –
    • – Low oxygen drills
    • – High oxygen drills
    • – Flooding Loop
    • – Electronics and battery failure
    • – Properly execute the ascent procedures for an incapacitated CCR diver
  • 9.Helium Considerations

For certification you must:

  • 1. Satisfactorily complete the written examination with a pass mark of 80% and 100% remediation
  • 2. Complete to the instructor’s satisfaction all confined and open water skill development sessions
  • 3. Demonstrate mature, sound judgment concerning dive planning and execution
  • 4.Course must be completed within 6 weeks from the starting date

Price includes all O2 gas requirements. DOES not include helium and sofnolime costs. These costs must be covered by the student

You can learn this course using either the JJCCR or SF2

Read more about the units by clicking below …

JJCCR LinkSF2 Link


DOES NOT include helium and sofnolime costs

To book this course, a 20% ( ฿9,000 ) deposit is payable now. The balance is due on arrival.