I'm having problems with the GPS accuracy on my new Fenix 6 Sapphire. I'm running on the same footpath on this track log. I've tried GPS+Glonass and 1 sec recording. It is
Improving GPS Accuracy, Distance and Speed Readings on a Instinct Watch | Garmin Customer Support
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Garmin Fenix 7 Multi-Band GPS Accuracy Test - Is it worth the upgrade?! - YouTube