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Hi Guy,

> It is (at least over here in Australia) fairly widespread practice to =
> add one or two short deeper stops over what the deco models predict.=20

That's good to know!  The more people I speak with, the more people I 
find who have arrived at the same conclusions I have.

> Are you suggesting not just adding a couple more stop depths, but =
> stopping for a minute or two at a much greater depth, like say 1/2 the =
> pressure change between your bottom depth and your first stop ?=20

Yes, that is what I am suggesting.

> This would seem to suggest that normal ascent rates (10m/min)are not =
> slow enough stop bubbling from fast tissues ? (Bubbles/shunts in the =
> lungs being a cause for post dive fatigue).

I used to try to rectify it in physiological terms, but I gave that up 
when I came to the realization that we simply do not understand the 
physiology well enough to make those sorts of guesses.  However, my hunch 
is that it very-much involves fast tissues and bubble growth (not 
necessarily bubble formation - I am fairly confident that the bubbles are 
already there, or are actually "formed" by other processes).

Yes, you are right - the deep stops are functionally equivalent to a 
slower deep ascent rate.  The deep stops are a more practical way to deal 
with it, because maintaining ascent rates at 3m/min or less is somewhat 
impractical, especially on "blue water" ascents.  In truth, I still do 
very slow asent rates ( <6m/min), even between the deep stops.

Incidently, the published version of the article was somewhat abridged 
from the original.  Let me know if you would like me to send you the 
complete version.

Aloha,
Rich

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