Just a brief note about an observation made that may counter the adaptation argument.
Many years ago, and on mix, I had an opportunity to look at some line put down in a deep cave (around 300 feet) by Sheck Exley. It was supposed to follow the "gold-line" path. Instead it ran close to perpendicular to that pathway... directly into a pile of silt and a wall. It had been left in place to illustrate a point. My guess is that you get that point.
There may be a level of narcotic loading that one is able to deal with... the effects of nitrogen partial pressure are what they are and perhaps it is the other contributing factors that we can work around... in any event, there does come a point where narcosis wins... every time... even if you are used to diving with a buzz on.
Many years ago, and on mix, I had an opportunity to look at some line put down in a deep cave (around 300 feet) by Sheck Exley. It was supposed to follow the "gold-line" path. Instead it ran close to perpendicular to that pathway... directly into a pile of silt and a wall. It had been left in place to illustrate a point. My guess is that you get that point.
There may be a level of narcotic loading that one is able to deal with... the effects of nitrogen partial pressure are what they are and perhaps it is the other contributing factors that we can work around... in any event, there does come a point where narcosis wins... every time... even if you are used to diving with a buzz on.