TDI Trimix

TDI Trimix

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 with a blend of helium appropriate for the planned depth.

How do I begin?

You start with the training materials. We will provide you with and TDI Trimix Diver manual so you can do all your studying at home before you come to the dive centre.

What's in the course?

  • Advanced decompression dive planning including:
  • Decompression diving procedures
  • 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 labelling, analysing Trimix, Nitrox and mixes, and gas blending procedures

How long does it take?

The TDI Trimix course takes 3 days. If you have not dived with us before, then we will require you to do a an additional check dive with us.

What qualifications do I need?

The TDI Advanced Nitrox and Decompression Procedures qualification or equivalent and proof of 100 dives are the pre-requisites for this course.

The minimum age of enrolment on this programme is 18yrs.

You will need to fill out a self certification medical statement. If you have any medical conditions you think may prevent you from scuba diving please feel free to contact us and we will try to be of assistance.

What's next?

Once you have completed your TDI Trimix Diver certification why not take some dives on Zenobia to enjoy your long no-decompression times, or do a 60m dive with us to build up experience before moving on to your Advanced Trimix course


TDI Trimix course is 4 dives and costs €850.00 including gases, cylinders and boat (manual, certification and kit hire are not included).