• Trimix


As your motivation to explore progresses you will find that you may want to go deeper to dive that wreck that is part of history or that cave system that you have read so much about.  

One of the major limiting factors of going deeper is narcosis; TDI’s Trimix Diver course shows how to minimize the effects of narcosis by adding helium to offset the nitrogen in your breathing gas. While taking the Trimix Diver course your TDI Instructor will teach you how to plan and execute dives utilizing as little as 18 percent oxygen and diving to maximum depth of 60 m/200 feet with a blend of helium appropriate for the planned depth. The course covers topics and skills like

  • Dive team planning
  • Gas matching
  • Cylinder labeling
  • Surface marker deployment
  • Equipment configuration
  • Thermal protection options

Student Prerequisites:

  • Minimum age 18
  • Certified as a TDI Advanced Nitrox Diver (or equivalent)
  • Certified as a TDI Helitrox (or equivalent)
  • Provide proof of a minimum 100 logged dives

Qualifications of Graduates

Upon successful completion of this course, graduates may engage in technical diving activities utilizing
custom trimix mixtures without direct supervision provided:

  • The diving activities approximate those of training
  • The areas of activities and environmental conditions approximate those of training
  • Oxygen (O2) percentages are 18 percent or higher

Technical course prices do not include gas, charter fees or quarry fees. 


Starting from

Availability: Contact us for booking information

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