Why is significant? If a unidirectional bezel is knocked and accidentally moved on the dive, it could only Screen a longer underwater time. That means the wearer will overestimate as an alternative to underestimate immersion time, and in predicaments that have to have decompression stops, this can be a make-it-or-split-it https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/