outofofficebrb
HARRO HUNNAYYY
It wouldn't. You can get on the plane straight out of the water and it will still happily show 24 hours of no-fly time when cabin pressure drops and your joints start hurting (or as @DuboisP put it "you maybe will lock out").
HTH
Okay, I was totally confused by that and kept reading it again and again and thought I was going crazy. That's what I thought. (How would it know to?) Thanks for clarifying! I do know that if you are in gauge mode then it won't let you go to air or nitrox mode because it obviously doesn't know how much you've accumulated already. That's the only "lock out" I know of off the top of my head.