Hamilton Watch Khaki Navy Scuba Auto H82315331. Beachside, poolside or in the deep, the new Khaki Navy Scuba is guaranteed to make a splash in the style stakes. For modern mariners, snorkelers, surfers and beach lovers, its eye catching as well as functional. Whether youre timing your swim, your run or your time in the sun, it will make sure you keep your cool, even in soaring temperatures.