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This Chess study does not reflect reality. It only shows that under influence of hyperbaric influence, or under the influence of being in a chamber, you play worse chess. A study made at the german navys medical institute in Kiel showed a different aspect , which is not often mentioned. It revealed that tasks learnt at depth were worse reproduced at the surface, task learnt at the surface were worse reproduced at depth. Consequence: Do not change the environments between learning and execution. This would imply that if you wanted to go deeper, then you are required to train the tasks needed while being deeper, while on the same gas, in the same overall environment. My personal view on that is, that you can learn some tasks and perform pretty well and safe, but you do it with a more closed mind, and may not noticing that narcosis may creep on from behind, and it does not reflect decompression procedures. As to impairment or not, out of 26 candidates for a CMAS 2** instructor exam in 1993 there was only one who did the air consumption calculation right at 47m. I noticed myself that I was absolutely able to collect and write down data from divecomputers at a chamber ride at 50m, or some years ago writing wetnotes which did not differ from normal my handwriting a 60m, all on air. But the same time we experienced people not being able to write down a single intellegible letter, or we had a chamber nurse who was pretty much narked at 50 m, to a degree that she could not perform her duty of monitoring and handling doppler and sampling equipment which was needed in this study. There are big interpersonal differences, that cannot neither be denied or levelled out. There are intrapersonal differences as well, according to amount of sleep, circadiane influences, drugs, and more. I would not bet my life on it that I could handle things equally well each day, and this implies for me that there is an element of inherent risk. Thus it makes a policy based on marketing deep diving on air as a standard specialty obsolete. Matthias Rod Linn schrieb: > > On this list I have read references to a chess playing study done where one participant was in a chamber and the other was outside the chamber. Can anyone tell me where I can find a paper on this or at least more information. > > I have a friend that just completed an extended range deep air course where he was taught that "with training" you can learn to overcome Narcosis and it's effect on task loading. He made repetitive dives to 200 feet on air using independent doubles an switching to EAN40 at 160 fet for an ascent/deco gas. He truly belives that he is one of the lucky ones that doesn't get narcosis. > > He won't listen to me so I need it to come from a source of authority. My thinking is that maybe a university study or something like that will educate him. > > Thanks to everyone for their help. > > Rod Linn -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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