How to Maintain a Dive Watch
Most dive watches feature crowns that screw into a tube fitted into the watch case, which, in turn, features a seal that prevents water from entering. But if the crown isn’t fully locked down when you go diving, water may find its way into the watch, possibly ruining the movement and resulting in a costly service... More here.
I thought this article may be a bit obvious and it kind of is, but it does avoid teaching you to suck eggs. Just enjoy your dive watch, give it a few knocks and enjoy it!