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GPS track "open water swimming" much longer

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  • T Offline
    Teutch Bronze Member
    last edited by Teutch 30 Sept 2020, 12:49

    I ask you to help me understand why using the “open water swimming” mode the GPS track is so jagged and much longer (about 2437mt against the real 1100mt)?

    (I swam straight to the edge of the beach 😅😅😅 and I didn’t abuse alcohol before swimming)
    Screenshot_20200930_133549_com.stt.android.suunto.jpg tra

    Ł 1 Reply Last reply 30 Sept 2020, 13:18 Reply Quote 0
    • Ł Offline
      Łukasz Szmigiel @Teutch
      last edited by 30 Sept 2020, 13:18

      @Teutch you’re lucky to have any track at all 😉 it’s generally hard to get a stable gps signal while swimming because the hand is often under water which is very effective in blocking the signal. Try putting watch in buoy or on your head (under hat or something similar).

      S9PP 2.40.44

      S 1 Reply Last reply 19 Oct 2020, 09:27 Reply Quote 0
      • B Offline
        bbx100 Bronze Member
        last edited by 30 Sept 2020, 15:27

        @Teutch said in GPS track "open water swimming" much longer:

        understand why using the “open water swimming” mode the GPS track is so jagged and much longer (about 2437mt against the real 1100mt)?

        You should wait for some time after you get GPS signal, but before starting of activity for watch to “warm up” with GPS. I usually have relativly ok swim path graph, close to reality while swimming outdoors

        1 Reply Last reply Reply Quote 0
        • S Offline
          Sven_Kiel @Łukasz Szmigiel
          last edited by 19 Oct 2020, 09:27

          @Łukasz-Szmigiel
          not generally… only with Spartan…my Ambit works great in open water. 😉 https://strava.app.link/QuRM0uvUHab

          1 Reply Last reply Reply Quote 1
          • Y Offline
            Yurgo
            last edited by 23 Jul 2021, 09:47

            Hi there! Did anyone manage the situation with open water swimming? I’ve tried to swim many times with different options as GPS only and GPS+Glonass. It seems that the watches gets less accuracy that it used to be 2 years ago. Recently I’ve tried to warm watches by switching on training before go swimming. After I had waited for 5-10 minutes I started activitiy. But eventually i got huge descrepancy between real distance 1,5 km and measured by watches which showed 2,2 km! My wife swan together using Garmin Fenix which showed very accurate track without any warm, just using cold start.

            R 1 Reply Last reply 23 Jul 2021, 10:15 Reply Quote 0
            • R Offline
              renton82 Platinum Member @Yurgo
              last edited by 23 Jul 2021, 10:15

              @yurgo Which Garmin does she use? All 945/Fenix 6 and i think all Garmin with Sony chip tend to understimate distance when set up in open water swim mode as i tested in this video: https://www.youtube.com/watch?v=M88WksWOn1w

              Y 1 Reply Last reply 23 Jul 2021, 10:24 Reply Quote 0
              • Y Offline
                Yurgo @renton82
                last edited by Yurgo 23 Jul 2021, 10:24

                @renton82 said in GPS track "open water swimming" much longer:

                @yurgo Which Garmin does she use? All 945/Fenix 6 and i think all Garmin with Sony chip tend to understimate distance when set up in open water swim mode as i tested in this video: https://www.youtube.com/watch?v=M88WksWOn1w

                She uses Fenix 5s. We swam many times at places where i exactly know how long track was. It could easy be checked by maps. As well as we raced at competitions where the the distances were approved and checked by GPS. Every time I faced with much less stable distance measurement than her watches and than real distance. Usually spartan shows more distance and very shaped track.

                The problem with OWS tracking lasts for some years. Why doesn’t anyone pay attention for this situation?

                ? 1 Reply Last reply 23 Jul 2021, 10:42 Reply Quote 0
                • ? Offline
                  A Former User @Yurgo
                  last edited by 23 Jul 2021, 10:42

                  @yurgo said in GPS track "open water swimming" much longer:

                  @renton82 said in GPS track "open water swimming" much longer:

                  @yurgo Which Garmin does she use? All 945/Fenix 6 and i think all Garmin with Sony chip tend to understimate distance when set up in open water swim mode as i tested in this video: https://www.youtube.com/watch?v=M88WksWOn1w

                  She uses Fenix 5s. We swam many times at places where i exactly know how long track was. It could easy be checked by maps. As well as we raced at competitions where the the distances were approved and checked by GPS. Every time I faced with much less stable distance measurement than her watches and than real distance. Usually spartan shows more distance and very shaped track.

                  The problem with OWS tracking lasts for some years. Why doesn’t anyone pay attention for this situation?

                  Maybe because it is techinically difficult to solve (just a guess!).
                  On garmin forums there is a lot of complains also about that topic on various watches.

                  Y 1 Reply Last reply 23 Jul 2021, 12:38 Reply Quote 1
                  • Y Offline
                    Yurgo @Guest
                    last edited by 23 Jul 2021, 12:38

                    @andré-faria said in GPS track "open water swimming" much longer:

                    @yurgo said in GPS track "open water swimming" much longer:

                    @renton82 said in GPS track "open water swimming" much longer:

                    @yurgo Which Garmin does she use? All 945/Fenix 6 and i think all Garmin with Sony chip tend to understimate distance when set up in open water swim mode as i tested in this video: https://www.youtube.com/watch?v=M88WksWOn1w

                    She uses Fenix 5s. We swam many times at places where i exactly know how long track was. It could easy be checked by maps. As well as we raced at competitions where the the distances were approved and checked by GPS. Every time I faced with much less stable distance measurement than her watches and than real distance. Usually spartan shows more distance and very shaped track.

                    The problem with OWS tracking lasts for some years. Why doesn’t anyone pay attention for this situation?

                    Maybe because it is techinically difficult to solve (just a guess!).
                    On garmin forums there is a lot of complains also about that topic on various watches.

                    Maybe youre right. But I am suprpised why difference is so high between two devices. I practice the only swimming and this type of activity is very important for me so i feel disappointed every time when checking my results at OW. However I enjoy using spartan at pool training to be honest.

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