• TDI Trimix Diver

TDI Trimix Diver

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


  • Minimum age 18
  • Minimum certification as a TDI Advanced Nitrox Diver and TDI Decompression Procedures Diver, or equivalent
  • Provide proof of a minimum 100 logged dives

Course Materials

TDI Extended Range Entry Level Trimix Diver Manual

Equipment Needed

Due to the wide range of configurations that can be used we work with each individual to insure each person has the proper equipment rather you are doing the training on a rebreather or open circuit.

What's Your Next Adventure

After achieving the this level of certification, you will want to enhance your skills and knowledge. Check out: Advanced Wreck Diving

Starting from

Availability: Contact us for booking information

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