Helitrox Diver



The TDI Helitrox Diver course is an alternative to the traditional TDI Decompression Procedures course, but can also be taught as an upgrade for divers who have already gained their Decompression Procedures certification. As well as covering all of the in water content and theory of the Decompression Procedures course, students will gain the additional theory and dive planning considerations needed when planning dives using Helium, and conduct at least two dives using Helitrox to a maximum depth of 45m.


What Will You Learn?

There are many benefits to using Helium as a breathing gas, as well as a few additional considerations that need to be taken into account. This course will explain why deep divers use Helium and teach you to plan and execute decompression dives utilising up to 20% Helium in your primary gas mix.

The majority of our Helitrox Diver courses are run in combination with the TDI Advanced Nitrox course, so please check out our Combined Courses page for more details, along with upcoming course dates.



  • Minimum age 18 
  • Certified as an Advanced Open Water Diver with Deep specialty, or TDI Intro to Tech or equivalent 
  • Certified as a TDI Advanced Nitrox Diver or equivalent. Student may be enrolled in both the TDI Helitrox and Advanced Nitrox course at the same time 
  • Provide proof of 50 logged dives 


Ready To Book?

Simply choose from one of our available course dates below. A £100 deposit will secure your chosen course start date, and the balance can be paid any time before the end of your training. If you don’t see any suitable dates, please get in touch and we can try to accommodate your request.

No Courses Found