Hold up, you memorized dive tables? That's wild. Even back in dive school nobody I knew had the whole thing locked in, we just used the wheel or a chart clipped to the board. The 2008 vs 2023 split is a big deal though, that five minute difference on a 130 foot bottom time is exactly what gets guys bent in the Gulf if they're running old math. Most boats I've been on run a Shearwater, but they still keep the printed tables in the dry bag for backup, and the whole crew better be reading from the same version. I'd bet half the guys out of Galveston are still working off whatever their instructor handed them in 2010 and don't even know the manual changed.