Why is critical? If a unidirectional bezel is knocked and accidentally moved with a dive, it could possibly only display an extended underwater time. Which means the wearer will overestimate as opposed to underestimate immersion time, and in scenarios that require decompression stops, this can be a make-it-or-break-it factor that https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/