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In particular, potential hazards, legal considerations and liability issues will be addressed.
On completion, the participant should be capable of blending gasses for his/her own use and also as required by other divers.
Through your extended range training you have developed the confidence to deal with extra, more cumbersome equipment and the psychological challenges presented by colder, deeper water and longer ascents requiring mandatory decompression stops.
You are prepared for the final step in the development of your OC training skills.
The IART Advanced Trimix course is the ultimate step. It takes you well beyond the skills and abilities of the majority of recreational divers but it demands a high level of understanding, practise and competence from those that undertake the training.
Until recently the terms “Trimix” and “recreational” seemed paradoxical to divers. Trimix was considered to be the domain of extreme divers wishing to go way beyond the depths regarded as safe for recreational divers. A gas for risk-takers prepared to endure long decompression stops in order to make a safe ascent.
The recent wave of reliable and affordable Trimix dive computers plus the increasing availability of the gas at ever more affordable prices has caused many divers to think again. After all, you are already diving with Nitrox and have learned that with a little care when analysing the gas, it offers many advantages over air. You have already adapted your equipment to be compatible with oxygen-rich gas mixes. Is Trimix so very different?
In order to undertake this course you have already learned and become familiar with handling two stage cylinders as well as your primary supply. You have learned to deal with the psychological implications of dives with mandatory decompression stops and you have learned the advantage of a second decompression mix to reduce ascent times and the precautions you need to take when switching gasses.
In fact, you are already at a point where you have the experience and skills to dive deeper but as you are certainly aware the physiological implications of diving deeper with oxygen/nitrogen mixes would make this a very risky undertaking.
No-stop times at depths shallower than 30 metres still allow a diver to have a reasonable dive with enough bottom time to explore the dive site but beyond this the available no-stop time to enjoy deeper, more intact wrecks and less-visited deep reefs is simply too short!
Decompression techniques allow the diver to go deeper and still enjoy enough bottom time to make the dive worthwhile. A well-equipped buddy pair often have the wreck to themselves after the rest have left for shallower depths after only a few minutes.