list your pony bottle size options / reasons

[arcFlash]

By the way, anyone thinking they can do the SAC test sitting on the couch to get the rest number, it doesn't work. First, I've tried it and you can't use enough air in an hour to get accurate numbers and second the physiology of the thoracic cavity and esophagus changes while diving. Respiration is at best 83%.

"... The Tidal volume decreased during immersion, average only 83% of the surface value. Hense, Immersion was associated with a marked stiffening of the respiratory system. In all, there were three factors effecting pulmonary functions during immersion: the FCR reduction, the change in the thoracic configuration and the diaphragm configuration, and the stiffening of the respiratory system."

It's interesting to note that the consumption numbers for L/min of gas and this marked decrease in respiration efficiency lead the quoted author to the conclusion that one is unlikely to over-breath the regulator but they over-breath their pulmonary system.

If you like reading really dry white papers this is an awesome read. I've read it twice.
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