TDI CCR Helitrox Diluent Decompression (45m)

TDI CCR Helitrox Diluent Decompression Procedures (45m)

This is the second level certification course for divers wishing to utilize a Closed Circuit Rebreather (CCR) for mixed gas diving using a Helitrox Diluent. 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, using an air/nitrox/helium diluent for formal decompression diving. Students 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

How do I begin?

You start with the training materials, if you did not get them with a previous course, ie TDI CCR online code/TDI Diving Rebreathers manual. You also need to have a copy of the manufacturer's manual for the specific unit.

What's in the course?

The TDI CCR Helitrox Diluent Decompression Procedures Diver course takes an in-depth look at all of the following and more:

  • History and evolution of rebreathers
  • Comparison of open circuit, closed circuit and semi closed circuit rebreather systems and the benefits/problems with each
  • Practical mechanics of the system
  • Gas physiology
  • Electronic and manual systems design and maintenance
  • Dive tables
  • Dive computers
  • Dive planning
  • Emergency procedures
  • Helium considerations

How long does it take?

The TDI CCR Helitrox Diluent Decompression Procedures course takes 5 days and includes 420 minutes of Open Water CCR diving over a minimum of 7 dives and 1 confined water dive.

What qualifications do I need?

The TDI Advanced Nitrox Diver, Deco Procedures Diver or Helitrox diver or equivalent from agencies recognized by TDI, is a pre-requisite for this course. You are also required to have 50 logged dives and 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. Contact us for more details.


What's next?

Obivously TDI CCR Mixed Gas when you have built up your hours on the unit.


TDI CCR Helitrox Diluent Decompression Procedures course is 7 dives and costs €850.00 including gases, cylinders and boat. (manual/online code, certification and unit hire is not included).