I have used the HRM-Swim for the past 5 dives and each time I download the data to the activities it has missing data usually in the length of 20 minutes or so. I "pre-wet" the strap before putting it on, put it on 20 minutes or so prior to diving and confirm it is reading properly. I dive using a dry suit and the watch reads properly out of water through the dry suit. The missing data happens in a single section of each dive and has happened throughout the dives but tends to happen in the middle at the highest depth. I do not believe depth and the missing data are related though given how much air is added to the suit eliminating squeeze. I have found a couple posts over a year ago regarding this with no resolutions. Anyone have a fix?
