Neato! It really is just a piece of (waterproof) paper on a clipboard – and you write on the clipboard, too – and with just a regular graphite pencil. I can't say I've ever given much thought to how one might write underwater in that situation, but if I had, I would've guessed some sort of waterproof tablet. But it's cool to see that sometimes the basics work better.
The most surprising thing to me here, is that I'm looking at a scuba diver writing on what appears to be a piece of paper on a clipboard.
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