It is ironic that, while watch companies are turning out more capable dive watches – helium release valves, absurd water resistance, innovative bezels – fewer and fewer SCUBA divers are wearing watches at all. Go on any dive boat and you’re lucky to find one person wearing anything besides a dive computer on his wrist. The fact of the matter is, dive watches have become anachronistic novelties to all but a few old school divers who still rely on memory and math skills to calculate no-decompression limits. But dive watches are more popular than ever for even those who will never dip a toe in the ocean. Perhaps because of this surge in their popularity, combined with their lack of real world use, dive watches suffer from numerous misconceptions. People love to wear them but don’t know a helium release valve from a no-deco limit. We’re here to help. This article explains some of the basics of the dive watch, debunks some myths and sets things straight.