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>Since the behavior (i.e., degree of saturation) attained by any single
>pure substance under varying conditions *should* be fairly "algorith-able"
>(my neologism of the day!), I can't see any real adavntage to carrying
>the actual substances on each dive, as opposed to virtual analogs of a
>lot of them :-). As a lover of mechanical gadgetry, however, the old
>gas-bag&orifice decompression meters (which, as ddoolette pointed out,
>resembled this concept) were way fascinating.
>
>Dave Ventre
>Quincy, MA
>

Weinke (sp?) in one of his books suggests that nonsupersaturation bubble models 
require more computing power than can comfortably fit on your wrist.  Hence a 
physical analog is one possible way around this problem.  In the case of 
supersaturation models both digital and analog devices already exist.  

I expect that the real problem with bubble models is the cost of testing any 
new decompression model.  When someone is ready to put up the $$'s we will 
get a nonsupersaturation model.  

Barrie Kovish
Vancouver, Canada
bmk@ds*.bc*.ca*

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