Gauge mode is something we have thought about, and that often comes up as a question. For a recreational computer the main problem we see is that if it is entered for a dive, It invalidates any subsequent deco calculations for a significant time afterwards. It's kind of the equivalent of a lock out, which is something we wanted to avoid. I have wondered what is really the goal in having a gauge mode on a computer- is it just to turn off deco calculations? To avoid alarms? To have a different, simpler display? The computer is, obviously, always a gauge- just one that does extra calculations. I'd like to understand better what divers want to accomplish (or not accomplish) with a gauge mode.