How to use Terrain follow (Ardupilot only)

Unfold and connect the software and hardware drone components
Launch the UgCS desktop
Click "Add new route"
Select "Create from scratch"
Give a friendly name to the route
Select the used vehicle and click OK
Input take-off parameters if different from default and click OK
Select desired route type and enter all the necessary parameters
Enter desired "Flight height" which will be maintained by the altimeter and "Altitude Mode - Range Finder"
Select Altitude Mode - Range Finder
Upload the route to the vehicle
Switch the vehicle to Auto mode
The drone should now take off and fly the route