Why is the fact crucial? If a unidirectional bezel is knocked and unintentionally moved over a dive, it could possibly only Exhibit an extended underwater time. Meaning the wearer will overestimate instead of underestimate immersion time, As well as in situations that need decompression stops, This may be a make-it-or-crack-it https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/