Dawg, Thanks for your reply! It never went to RTH and even if it did, it would stay at 222 ft which is more than enough to clear that hill. Done it many times before That hill is only 175 feet high, I never regained a connection to the aircraft, almost as if it malfunfuctioned. When I lost signal I waited a minute or so and when it didn’t regain, I jumped in my car and went right by the spot where it lost signal. I have lost signal previously and always been able to regain connection. Even at a distance of over 6,000 feet away.