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| Originally Posted by Mark Powell Brian you should know better than that.
You DO NOT need to dive to 45m to get experience with Adv Nitrox and Deco before Trimix. The course standards clearly state that one of the qualifying dives needs to be deeper than 30m, but that can be 31 or 32m. Once qualified, If the diver really doesn't want to dive below 30m then they can then get experience in the 25m-30m range before going on to Trimix. If even a single 32m dive is more than they are willing to accept then they can combine Advance Nitrox, Deco Procedures and Trimix into a single course so that they never need to dive below 30m on anything other than Trimix. It's a long intensive course but is perfectly accetable under TDI standards (sort of sounds a bit like a Tech 1 course).
One of the advantages of TDI is that it offers the flexibility to follow either path. |
This is exactly what I did. I took AN&DP in 2004 and spent 18 months diving with deco gas in the 25-35m range before taking the Entry Trimix course. The deepest I dived was 42m on the Markgraf with Tricky and neither of us was too happy about it. That was what prompted us booking the trimix course as soon as we got back from Scapa.