Steps to Calibrate the Barometric Altimeter on the vivoactive 3 Series Watch | Garmin Customer Support
![Altimeter auto-calibrates itself during activity although set to Start-Only - fēnix 5 Plus series - Wearables - Garmin Forums Altimeter auto-calibrates itself during activity although set to Start-Only - fēnix 5 Plus series - Wearables - Garmin Forums](https://forums.garmin.com/resized-image/__size/960x720/__key/communityserver-discussions-components-files/169/IMG_5F00_20190604_5F00_143728.jpg)
Altimeter auto-calibrates itself during activity although set to Start-Only - fēnix 5 Plus series - Wearables - Garmin Forums
![After calibrating the barometer the trending arrow is pointing down 15min after every altimeter calibration - fēnix 5 Plus series - Wearables - Garmin Forums After calibrating the barometer the trending arrow is pointing down 15min after every altimeter calibration - fēnix 5 Plus series - Wearables - Garmin Forums](https://forums.garmin.com/resized-image/__size/960x720/__key/communityserver-discussions-components-files/169/20190818_5F00_113007.jpg)
After calibrating the barometer the trending arrow is pointing down 15min after every altimeter calibration - fēnix 5 Plus series - Wearables - Garmin Forums
![Fenix 6 "GPS + Galileo + Elevation Auto Calibration" altitude problem - fēnix 6 series - Wearables - Garmin Forums Fenix 6 "GPS + Galileo + Elevation Auto Calibration" altitude problem - fēnix 6 series - Wearables - Garmin Forums](https://forums.garmin.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/431/MyGPSFiles3.png)
Fenix 6 "GPS + Galileo + Elevation Auto Calibration" altitude problem - fēnix 6 series - Wearables - Garmin Forums
![Altimeter auto-calibrates itself during activity although set to Start-Only - fēnix 5 Plus series - Wearables - Garmin Forums Altimeter auto-calibrates itself during activity although set to Start-Only - fēnix 5 Plus series - Wearables - Garmin Forums](https://forums.garmin.com/resized-image/__size/960x720/__key/communityserver-discussions-components-files/169/IMG_5F00_20190604_5F00_143738.jpg)