Why is important? If a unidirectional bezel is knocked and unintentionally moved with a dive, it could possibly only Exhibit an extended underwater time. Meaning the wearer will overestimate as opposed to underestimate immersion time, and in circumstances that need decompression stops, this can be a make-it-or-split-it element that helps https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/