Klaus wrote:For what I know, you don't have to have GPS on, on you phone! The GPS are handled by the Phantom.
When you set HOME the NAZA memorizes its takeoff coordinates and makes that the center of your Radar display. As the pilot usually doesn't move from his location, this works quite well. If you rotate about your position, your phone's compass is used to update the Vision's vector w/respect to you. If you yaw the aircraft, the Vision's GPS is used to update the nose of the arrow in your Vision app. I think the only time your phone or tablet might utilize its built-in GPS is if you've lost the WiFi link to your Vision and open the Find My Phantom Vision map. But if your iPod, iPad, or tablet doesn't have GPS, then it will use a combo of Compass and last valid WiFi router location information to figure out where you are. The dot of the Vision will be its last known coordinates as reported by the NAZA to the Vision app.