Everything was fine. This WAS NOT pilot error. I was flying with FPV shooting some trick fly water boarding just off the bay shore. All of a sudden I lost my hover from about 20 feet above the water and down she went. Just fell out of the sky. Had only been flying for about 7 minutes on a full battery. Using the stock transmitter is all I can think of here. It has never done this before. The ONE TIME I fly over water this happens! I was flying in GPS mode and was all green. Both switches were facing up. I did noting wrong! I know better than to challenge DJI on this as I will get nowhere. Why don't they just sell these things with stronger transmitters? I was well within the range and watched the whole thing as the craft was non responsive to my full left stick UP command. It just dropped out of the sky from about 100 meters away. $1600 bucks swimming with the fishes now Any thoughts out there. Depressed.