TDI
Trimix
Trimix
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Who is this course for?
Who is this course for?
The certified Advanced Nitrox and Decompression Procedures diver looking to:
Extend their depth range
Reduce narcosis for all deep dives
Advance their technical diving education
Course prerequisites
Course prerequisites
Minimum age 18
Minimum certification of TDI Advanced Nitrox AND Decompression Procedures Diver, or equivalent
Proof of 100 logged dives
What you can expect to learn
What you can expect to learn
Advanced decompression dive planning including:
Gas planning based on equivalent narcotic depths, nitrogen and helium absorption and elimination, CNS and OUT limits, Isobaric Counter diffusion, volume requirements, etc.
Decompression gas choices
Tables vs. personal dive computers
Emergency and contingency planning (equipment failure, omitted decompression, etc)
Decompression diving procedures
Equipment selection
Pre-dive checks and drills
Stress analysis and mitigation
Following a decompression schedule
Gas switching
Team awareness and communication
SMB/lift bag deployment
Proper trim, buoyancy and finning techniques
Management of multiple decompression/stage cylinders
Emergency procedures (equipment failures, catastrophic gas loss, omitted decompression, navigational errors, injured/unconscious diver, etc)
Equipment considerations, cylinder labeling, analyzing trimix nitrox and mixes, and gas blending procedures
What's in it for you?
What's in it for you?
Ability to conduct technical diving activities using custom trimix mixtures without direct supervision provided:
The diving activities approximate those of training
The areas of activities approximate those of training
Environmental conditions approximate those of training
Ability to enroll in TDI Advanced Wreck and TDI Advanced Trimix courses
Trimix Diver minimum requirements
Trimix Diver minimum requirements
Satisfactorily complete the TDI Trimix Diver course written examination.
Complete all open water requirements safely and efficiently.
Demonstrate mature, sound judgment concerning dive planning and execution.




Are you looking to expand your depth range? Do you want to reduce narcosis during deep dives? The TDI Trimix Diver Course could be your next step!
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 metres/200 feet with a blend of helium appropriate for the planned depth.