The folllowing ardupilot forum is informational and explanatory indeed.I too agree with the following viewpoint.Some updations are required with the following Rover 4.0 r1.I want to include with it that I have been facing a problem regarding the Gps navigation.Whenever i go ahead and start the direction/navigate, the google map is showing/displaying a top view of the map. Location wise it will update as i move along the route but it will not show me the turn by turn instruction .It will always say trying to search for gps. But when i open google map and tap where my location is,it is accurate and able to point where i am.but whenever i tried to use it to start direction and navigate it will just stuck at the top view but showing me the blue route that i choose.my pin point location will move along the blue route but no instruction or whatsoever from the app. This happens after there was a software update by android.Suggest us what to include regarding the garmin map updates free download 2019 for the updated resolution.