This question is more about how the RTH feature would react, but also an altitude question. If launch the Phantom from the ground at an elevation of 9,000 feet and fly above the forest canopy of say 400ft agl... If I loose sight of the phantom and must use the fail safe RTH, will the Phantom stay at the 400ft agl and not descend until over the landing point? The trees are roughly 60 feet or taller. Furthermore, I read a post on here about flying in canyons, and the way I understand it is... if the Phantom goes into RTH at an elevation below its starting point, it will only raise 60 feet from the point of lost connection. Therefore, if any obstacles are HIGHER than 60 feet from the point of lost connection, you run a high risk of the Phantom colliding with said obstruction. Is this correct? Is the moral of the story not to use RTH at an altitude that is lower than the starting point?