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Fenix 5 Plus not measuring swimming distance

My Fenix 5 plus is not measuring accurate swimming distance and sometimes not even moving in open water swim.
I did try gps; gps+glonass; gps+galileo, all same problem

  • What stroke do you swim - if breaststroke then that is the worst for accuracy as the watch is under the water most of the time. What I have also found makes a huge difference is giving the watch plenty of time to acquire satellites before starting the activity. Open the swimming activity and give it 3 or 4 minutes after you get green GPS indicator - all of this will help but not eliminate problems.

  • My experience is the same. You need to let the watch to fully acquire satellites connection before starting your swimming. I usually let it get 5-8 mins of time to do that (while I am getting ready to jump in the water). It looks OK afterwards when checking on connect but it is definately not perfect. 

    I tend to take one of my other gps devices with me and store it in the Swim buoy - Not an ideal situation but it works for accuracy.

    /Palle