A Valuable Tool Tip
I have always liked using wrist slates. Notebooks are useful for some purposes, but I find that I use a wrist slate much more often due to ease of access. I write down turn pressures or other dive details, teaching notes to review with my students and other tidbits I want to log later. To add to convenience I take a standard pencil eraser and drill a hole through the center, then skewer it with the bungee that secures the pencil to the slate. Having the ability to erase the slate makes it ever more useful.
On a particularly grimy dive, when I am squirming through tight passages where I might scratch my computer, I pull the slate over the top of the computer and peek underneath when I need data.