Thanks for the clarification.I reset the bezel to time the assent, I’m not using navy tables, I’m using IDeco Pro. Bottom time is from leaving the surface till you start the assent. I posted an example. I have all possible run times on a slate, usually 3, if conditions are poor I’ll leave early. If conditions are very good I’ll stay longer.
So you are not using tables, you are using a computer...
But you are not carrying the computer with you, you pre-calculate some diving profiles.
This is what I see often done by "tech" divers.
My concern with this approach is: what do you do if, for any reason, you are doing a dive which exceeds the max depth, or the bottom time, or the ascent time of your pre-computed profiles?