I took my Mavic to Guatemala for a Sail Fishing trip. I tried to fly it the night before at the Resort and there was to much interference. They have Wi-Fi. I moved 20 feet farther away and it received GPS Signal and I flew it with NO issues. The next mourning we took a 35 ft chartered Fishing boat 40 Miles SW of the Mariana. (Just my guess of the location.) I had an Asus S 8.0 already connected to the controller. I did a Flight inspection on the Drone and had the arms extended and the blades out. I was on the fly bridge with the Captain and the drone. The ship had NO Sonar only a hand held GPS. My daughter hooked a Sailfish. I placed the Drone on the front of the ship. The tablet was already turned on. I powered up the Drone and then the controller. After the Drone was connected to the Controller I waited for a GPS Signal. I then flew the Drone up Hovered and tapped the Tablet screen to Focus and flew it around behind the Boat. I was hovering around above the hooked Sailfish trying to get it on Video. I was behind the boat Hovering so I looked down at the Tablet screen to see what the image of the ship looked like. My daughter started yelling Dad look at the Drone. I looked up and it was just above the water trying to land IN THE OCEAN!!! I pushed the up stick and nothing. I let off and pushed it up again and it started to slowly rise. I looked down at the Controller and it showed Connected but the Controller and said Landing. I looked back at the Drone and it was Landing again!!! I thought I could just fly it to the front of the boat but I could not control the Drone to go down so I had to land back on the front of the ship using the controller and let it move down by it self. I NEVER had any control to move the Drone down to land it. It ALWAYS showed it was connected and said Landing on the Controler all the time.There was NO other Boat in the area. I was LUCKY to save it. I have not turned it on since. I am SO disappointed. As I had purchased it for this trip.