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Andy, our posts seem to have crossed.
I have to agree on the difference in the BSAC training materials. I too was caught out by the ppO2 of 1.44 thing during my exam - there was another question and answer combo which was nonsense (can't remember which now). I can easily see where this confusion would arise given the different versions of the instructor material that's probably out there.
Interestingly, I don't recall any mention of OxTox in any of the DL student notes - ok it maybe covered in the Nitrox course but a student could easily get to do DL without having done the nitrox course. How the hell are you supposed to be able to confidently DM nitrox divers when you don't even know that OxTox exists or is a risk?
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