My friend asks me to take aerial video of his lakeside facing house but there are 100 ft high tall trees between house and lake side. I know I can manually fly it high and set it to GS waypoints flying paths around his house and lake for easy job. However, GS Waypoints mode is not able to fly and recording video horizontally (left-right-left-right) along lakeside after flying over tall tree in front of house. Then, I can think of Course Lock flying under GPS mode but what can I do if signal between RC and PV2+ are blocked by tall tree while it's flying behind trees and I lose sight with the bird ? If signal is lost but GPS remains at least 6, can I click fail safe to bring it home ? how to lift my bird way up to get rid of 100 ft tree on its way home automatically ?