Related
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Open water swim reading high on the 945.

Former Member
Former Member over 5 years ago

Went for a sea swim this morning with both my 920 and my 945 to see what the difference was between the 2 as I was sure the last sea swim I did the 945 read a far greater distance. So after a loop the 920 read 1018m and the 945 read 1446m. Any remedies to correct this? The 920 is reading correct as we have measured the swim.

  • 0 over 5 years ago

    Would you post a link to the activities? 

    I can post any number of swims like these throughout this summer that my wife has recorded on her 945 - https://connect.garmin.com/modern/activity/4598205743

    The course is a measured 2000m out and back along a buoy line from the shore. Distance recorded does vary +/- 200m but bearing in mind tides and drift then it's definitely acceptable. What GPS and software version is your 945 on?

  • 0 over 5 years ago

    I found a similar thing recently. I swam w a friend and both of us have a 945. Two swims in a row I have recorded about 50% higher distance. The only thing I can think is that I had my phone in my swim bouy, so maybe it was somehow recording part of the swim on both? Will try the next swim without the phone. 

  • 0 over 5 years ago

    It also depends on which technique you swim. Freestyle is most accurate, whereas breastswimming is extremely inaccurate, since the watch doesn't get enough time out of the water for a proper signal. That's my explanation anyways..

  • 0 over 5 years ago

    Check this thread

    https://forums.garmin.com/sports-fitness/running-multisport/f/forerunner-945/168197/open-water-swimming

    You might have the same problem than me. In OW, distance/pace is measured two different ways, from accelerometers and from the GPS/GLONASS/GALILEO. In case GPS signal is lost, the watch keeps counting the distance from the arm movements, and when GPS is found again, it adds the lost GPS distance as well. - stupid solution, and it can not be set to rely only on orbit signal.

    What GPS settings do you have? I used GPS+GLONASS, next time I will check with GPS only. GPS+GLONASS definitely does not work for me.