The restrictions are for high speed and high altitude, not accuracy. You can use the GPS module at full accuracy if you aren't really high or going really fast.

The restrictions are for high speed and high altitude, not accuracy. You can use the GPS module at full accuracy if you aren't really high or going really fast. Model (high-powered) rocketry trackers occasionally run into this, but usually not an issue since you need the location data to find where it lands, and it's going pretty slow under chute.