triton94949
Guest
Rick Murchison:I wouldn't get too wrapped around the axle over whether you choose to express SAC in CF/min or PSI/min. Bob is correct that the generally accepted expression is in PSI/min, as that's usually the way it's introduced in OW training.
"RMV," however, is borrowed from the medical community, where it is generally expressed in Liters/min, which in Scuba in the States isn't particularly useful, and so we in Scuba usually use CF/m. Still, there's room for confusion.
Personally, I prefer the term SCR (Surface Consumption Rate) - a purely Scuba term, with the generally accepted expression in CF/min.
Rick
There is always room for confusion!
SCR gets confusing since this also represents Semi-closed Circuit Rebreather.
I use RMV-SCR when I am talking about the respiratory minute volume surface consumption rate, and SCR when I am talking about a Semi Closed Rebreather, and CCR when I am talking about a Closed Circuit Rebreather.
But you are right, its nothing to get wrapped around the axle about! (Funny expression! Denotes "wrapped too tightly" and that normally says it all.)