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On Tue, 28 Jun 1994, Carl G Heinzl wrote: > > Is this really possible??? Can people really tell the > difference in the narcotic effect between 125 and 150' (on > air) ??? Yeah, sure, some people can tell the difference between narcosis levels at these two depths. I used to be able to, but now I really don't detect any symptoms until I'm below about 165'. > > Since narcosis can be different from dive to dive I would think > it would be hard to establish a baseline to compare to. > > This amazes me. I'm not discounting it, just very very curious. Yes it is true that narcosis CAN vary from day to day, but in my experience, it usually doesn't - especially not in similar diving conditions. I can almost use my level of narcosis as a depth gauge. In fact, my depth gauge malfunctioned once, and I was able to realize it right away based on the level of narcosis (I later confirmed that the narcosis was more accurate by diving at the same place with a functioning depth gauge). > > I have noticed very little narcosis (virtually none) on air dives > as deep as 254' (with many of them in the 200-220' range). You are a very rare individual, and I do not doubt you on this. I have had discussions with other people who remain clear headed at such depths. I virtually always feel a steady "buzz" at 200', and usually get "hammered" if I go much below 250'. However, after a series of VERY (350'+) deep air dives, I was almost stone-sober at 270'. (Actually, I think it was more the case that I was narked all day long, so didn't notice much change at 270'). > Granted, I spent very little time at this depth (less than 3 minutes > for the 254' dive), but I was under 130 feet for approximately 15 > minutes and didn't notice any narcosis the whole time. This was > in warm water (80-84 degrees F). You are still a rare individual, because I'm feeling serious narcosis during the descent before I even GET to 250', let alone spend three minutes there. The warm water helps (i.e., cold water seems to exacerbate narcosis symptoms). Aloha, Rich
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