- I am creating my routes in Caltopo and importing the .gpx files on Garmin Explore to sync the routes to my Instinct. I select "Do Course" in Navigation and begin tracking. As I hike along the route I receive alerts for seemingly random numbers, they've read anywhere between 10-75 and provide no additional info. The time between alerts also seems completely random, ranging from 30 seconds to 3 minutes. I've checked both the Navigation Settings and Navigate Settings and no alerts are set for either. Anybody have an explanation for these alerts and how to configure/disable them?? Cheers.