Swim distance alerts
My S9P automatically starts and stop laps/intervals when swimming in a pool. I really like this feature. When swimming longer intervals (>200m) it’s easy to loose track about how many meters I’ve swum (# of 25’s).
The watch’s high frequency beep is easily to hear under water. So it would be a good idea to let the watch beep at each completed 100m. That means, 1 short beep @ 100m, 2 short beeps @ 200m, etc.
That way one would receive a short reminder of the completed distance in an interval.