yknot
Guest
Before anyone starts the computers rot your brain chant I'll start with the following. I use a Suunto Vyper but because my dive profiles are usually conservative I don't spend much time watching the tach on the side, as in there isn't much need to ascend when things get in the yellow because my profiles don't tend to go there anyway. That said, I set and used my computer for a nitrox dive for the first time recently. I noticed that when set in nitrox mode, the tach style gauge doesn't function as a NDL countdown (as it does with air) but rather as an O2 exposure clock. I'm trying to figure out what I'm failing to understand about all of this but, with Suunto's rep for being very conservative and with some diver's tendency to let the computer dictate a safe profile, couldn't you encounter a deco obligation (exceed the programming NDL time limits) before entering the caution zone for O2 exposure? If so, when set in nitrox mode the NDL info would not be available in the normal manner.