Each watch responds to the needs of its wearers - elegant responds to the needs of elegant people, sporty - for lovers of various sports. Meanwhile, there is a category of watches that respond to a unique audience - divers, both professional and amateur. Water resistance of 200 meters and more allows diving to more significant depths, which require the use of an aqualung, that is, instrumentation such as an oxygen cylinder. This makes diving to shallow depths not only possible, but also extremely comfortable.
Anyone who not only enjoys swimming, but can not imagine a vacation without spending an extended period of time in the water knows perfectly well what risks this poses to the watch. That's why manufacturers of many brands have made sure that such an inconvenience never arises again. Thanks to the placement of the best possible seals and protection of the watch's drive train, no flooding is a problem, and the timepiece copes perfectly even at greater depths.
Watches for divers of a professional nature represent a much more advanced model of timepiece. These tend to be much larger, with a reinforced, pressure-resistant envelope - hence their slightly larger dimensions. Thanks to this, total insensitivity to the destructive effects of atmospheric pressure and splashes is guaranteed. In addition, in order to make it easier for users to operate the watch underwater, especially at considerable depths, where very little or no light reaches, the manufacturers designed these timepieces in such a way as to make the watch dial as clear as possible while maintaining its small size. This was done by enhancing elements such as indexes, which are now the most prominent elements of the entire dial. The same was done with the hands, which now bear largely arrows to improve visibility. The hands as well as the aforementioned indexes have also been coated with a luminescent layer, while some brands have used intensely luminous tritium tubes for illumination. All this guarantees extraordinary visibility and the ability to read the time even in the most adverse circumstances.