Trimix Diver

Diving trimix with an oxygen content between 18 and 21% (normoxic trimix) is the next step for divers qualified to the level of Decompression Procedures or Helitrox. The TDI trimix diver course covers this and allows you to dive to 60 metres. This course can be taken in backmount or sidemount configuration. 

The course is about more than extending your maximum depth, however. You will learn to handle two additional tanks apart from your bottom gas. These could be two different decompression gases or a travel gas and a decompression gas. Apart from bottle handling, in-water time focusses on dealing with team-based emergencies such as helping a toxing diver. You will also practice touch communications on a no-mask ascent. 

In the classroom we cover risk management associated with deeper dives as well as considerations associated with helium as a breathing gas.

The TDI trimix diver course culminates in four trimix decompression dives giving students the opportunity to practice running dives as a team.

Course Details

  • 5 days / minimum of 5 dives – including 4 decompression dives on trimix
  • Theory through manuals or eLearning (recommended) and practical application sessions
  • Extensive dive planning

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  • Tuition
  • Tank hire and bottom gas as required for the dives EXCLUDING helium and deco gas
  • Transport to dive sites in Gozo
  • Video analysis of your dives
  • Use of the O’Dive Doppler sensor for decompression optimisation

If you have never dived with us before or it has been a while since your last planned deco dives, consider adding one or two warm-up days to complete shallower deco dives and / or work on your equipment configuration.

  • With a number of trimix dives logged, you may want to consider TDI’s Advanced Trimix course. We recommend developing a great level of comfort diving four tanks as well as planning and conducting deco dives before taking this step.
  • For those looking for an alternative to open circuit diving, we also offer CCR diving try-outs and courses
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