I took my doubles for their first spin outside the pool yesterday at the local quarry. I have a Perdix AI with a transmitter on right post (SPG on left post). When I downloaded my dives, MacDive showed an RMV of .35/cft per min. My tank size is set to HP80. Is this RMV number actually correct in that I can plug it into formulas (or MultiDeco) to figure out gas needs for future dives?