Barometric altimeter. Everything you need to know about altitude on GPS
Annemiek van Vleuten on X: "Who can help me to solve problem with @Garmin 520 Edge accurate elevation? I can change elevation but it changes immediately to 20000m 🤤. 'Mark location' is
Incorrect elevation gain when syncing with Strava - fēnix 7 Series - Wearables - Garmin Forums