You don't check your dive computer before going on a dive? I mean I get that is a much simpler device and more reliable, but I'm not sure that I would make the

You don't check your dive computer before going on a dive? I mean I get that is a much simpler device and more reliable, but I'm not sure that I would make the trade-off of not pulling it out and powering it on instead of possibly getting to wherever I'm diving and finding that it's dead or nonfunctional and being out of luck.