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On Fri, 6 May 1994, Jody Svendsen wrote:

> > Perhaps the people who experience strong narcosis in the beginning of the
> > dive are just getting a head-rush after reverting themselves upon reaching
> > the bottom.
> 
> In Miami we often make deep dives in extreme currents were you can barely 
> pull yourself down to the bottom (some days you can't make it.)  We often 
> get strong narcosis at the beginning of dives in the 160-230ft range.  
> Because we are pulling ourselves down the anchor line, we are in the 
> "skydiver" position that you mention to minimize our drag.  This would 
> seem to conflict with the "head-rush" hypothesis.

Interesting....it seems the blood-pooling hypothesis isn't getting a lot
of support.  Anybody got any ideas why some folks start out with strong
narcosis then acclimate, while others experience gradually increasing
narcosis throughout the dive?


Aloha,

Rich

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