Why is always that critical? If a unidirectional bezel is knocked and unintentionally moved on the dive, it may possibly only Exhibit an extended underwater time. Meaning the wearer will overestimate in lieu of undervalue immersion time, and in cases that demand decompression stops, this can be a make-it-or-crack-it issue https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/