sometimes you're not.
Much depends on how close to the limit you push the computer and how conservative it is. If you've got a lot of time remaining and the computer is conservative, you can probably back into the tables and be able to solve for the pressure group you are in.
However, most of the time at least, I can't do this beyond my first dive of the day. Sometimes I can't even do it for the first one. It all depends on the exact profile I was diving, what I was doing down there, how long I stayed, etc.
Much depends on how close to the limit you push the computer and how conservative it is. If you've got a lot of time remaining and the computer is conservative, you can probably back into the tables and be able to solve for the pressure group you are in.
However, most of the time at least, I can't do this beyond my first dive of the day. Sometimes I can't even do it for the first one. It all depends on the exact profile I was diving, what I was doing down there, how long I stayed, etc.