While using helium-based breathing gases, the TDI Trimix Instructor Course delivers the training required to teach trimix diving that requires staged decompression. Utilizing gases containing no less than 18% oxygen, candidates will complete the four required dives up to 60 metres/200 feet.

Topics that candidates may be asked to present include:

• Hypoxia
• Nitrogen narcosis
• Helium absorption and elimination
• Counter diffusion
• Dive planning
• Gas switching procedures

Trimix Instructor Course Prerequisites:

• Minimum age 2l
• Minimum certification as a TDI Trimix Diver and a TDI Advanced Nitrox and Decompression Procedures Instructor, or equivalent
• Proof of 15 certified advanced nitrox or decompression procedures divers; minimum of 10 must be decompression procedures divers
• Provide proof of 250 logged dives with a minimum of 20 logged Trimix dives outside of training, 10 of these dives must be in the last 12 months

Course Standards & Procedures