Technical Diver progression

Part 3

Helitrox

So far, we have covered the TDI Advanced Nitrox and Decompression Procedures courses.  As mentioned, the combination of these two courses allow divers to execute planned decompression dives to 150′ using up to 100% Oxygen in a single decompression gas cylinder.  Deep diving with Air or Nitrox presents  challenges such as Narcosis and Gas Density. One of the ways we overcome these challenges and add a margin of safety is through the addition of Helium in our primary cylinders.  The TDI Helitrox course allows divers to use up to 35% Helium in their bottom gas, which reduces the negative effects of breathing Air or Nitrox at deeper depths.  The name “Helitrox” is a combination of Helium and Nitrox, also commonly referred to as TriMix.

 Below is a list of some of the skills covered during the TDI Helitrox course,  both in water and in classroom.

• Advantages and disadvantages of Helium as a breathing gas
• Gas mechanics and bubble formation
• Trimix cylinder labeling, analyzing and blending
• Isobaric counter diffusion
• Thermal properties of Helium
• Hypoxia
• Gas Density
• Co2 production and retention

The combination of the TDI Advanced Nitrox, Decompression Procedures, and Helitrox course offers the most comprehensive program for becoming a Technical diver through TDI.  Divers that have these 3 certifications have the flexibility to choose the best breathing gas for the dive at hand.  If you are interested in this course and would like more information , click here to contact me.  I’m always happy to discuss course details and help you achieve your diving goals.