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For SCUBA diving, it is to tell you how long you've been underwater for, so you can determine (among other things) your nitrogen saturation. I'm not sure if the

For SCUBA diving, it is to tell you how long you've been underwater for, so you can determine (among other things) your nitrogen saturation. I'm not sure if the original design was specifically for that purpose, but every (dial-based) diving watch has such a ring.

thrdbndndn 4y ago
>I'm not sure if the original design was specifically for that The rotating dial (I'd rather call it bezel) literally has NSEW and degrees on it, it can't be original for counting time in diving.. Or maybe you're talking about different types of dial here?