Recreation diver:pony bottle?

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rjack321:
Excellent points. Thanks for bringing them up.

Mostly the fact that most of us who can rattle these rock bottom things off in our sleep generally have a lower SAC rate (even stressed) than those who don't know the calculations (because they are newer). We often use our best guesses, which may vastly understate a real, stressed OW student's SAC - which may approach 2 cf/min.
Click to expand...
I had one student (a large fellow who was also a smoker) who measured a 2.8 cfm working RMV ...

... Bob (Grateful Diver)
 
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https://www.shearwater.com/products/perdix-ai/

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