IanBrit
Contributor
Sorry to flog a dead horse, as this has already been covered by TS&M and Sat Diver, but I can think of instances where you could wind up in trouble that way. (for eg a backgas post leak)
Plus, the transmitters on the Sol aren't sending the pressure info fast enough to make this a reliable indication at the switch depth. They're no replacement for a visual check of what you're ABOUT to breath BEFORE you stick a reg in your mouth.