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TDI Advanced Trimix Instructor Course

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Course Overview

This course provides training required to compentently and safely teach breathing gases containing helium for dives that require stage decompression to a maximum depth of 100msw. The objective of this course is to train instructors in the benefits, hazards and proper procedures of utilizing custom oxygen, helium and nitrogen mixtures as breathing gases.


Minimum age of 21.
Extended Range or Trimix Instructor certified.
Proof of 250 logged dives out of which 30 must be trimix dives.
Proof of 20 dives deeper than 55msw.
Proof of 10 student certification at Extended Range or Trimix level or assist with at least two complete Advanced Trimix courses and provide a letter of recommendation from the assisted instructor.

Details of the course

The Advanced Trimix instructor course covers:

  • Physics
  • Physiology
  • Decompression options
  • Equipment consideration
  • Dive tables & dive computers
  • Dive planning
  • Procedures

Course duration and number of dives

The Advanced Trimix instructor course is a 4 day course and 4 dives are required.

Course Price

currency converter TATXI

Additional costs

Technical Rental equipment if needed. set p/day
Helium fills p/liter
TDI Advanced Trimix Instructor Manual
TDI Standards & Procedures Instructor Manual
TDI Evaluation forms

Equipment requirement

The Advanced Trimix Instructor course has some specific equipment required for this course on top of the standard gear. All students must own or purchase a spool, SMB and wrist slate. The oxygen clean regulators can be purchased or rented. We supply the double tank, decompression tanks, mixes and the oxygen and helium analyser.

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