https://ift.tt/2wwdHAe Why Your GPS Watch Is Not Entirely Accurate Running, Global Positioning System, Watches and Clocks If you’ve ever run a race with a GPS watch, you know that the distance on your watch is rarely an exact match for the advertised course distance. JEN A. MILLER https://ift.tt/2QWVTUw November 17, 2018 at 05:30AM