Why is always that significant? If a unidirectional bezel is knocked and accidentally moved over a dive, it might only Exhibit a longer underwater time. Meaning the wearer will overestimate as an alternative to underestimate immersion time, and in cases that demand decompression stops, this can be a make-it-or-split-it aspect https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/