Whatever....you came up with 42 cu. ft......I came up with 40. That's not unreasonable for 2 different people....yes...it is in the ballpark of thirds for an AL80...so what? you know what it is...are you not comfortable calling a dive when you reach the calculated point of no return pressure?Genesis:So now we have 3.5cf/min for 10 minutes, + 7.0cf for the first minute, or 42cf.
Now this is a bare minimum, as it does not allow for any increase in the donor's RMV, which is of course also likely.
But this puts "rock bottom" awfully close to THIRDS for a single AL80!
...uh...yeah....isn't that why we ran the numbers? We came up with 1550 (mine) and 1635 (yours) as minimum "leave the bottom" pressures.you've got a real problem if someone TRULY needs to bail and you're using the typical "be back at the line @ 1000 psi" type of dive planning. You WILL run out on the way up.