Ok....Not new to flying. I fly Heli's and Planes . I bought my P3P about 3 months ago. I'm not crazy about losing my phantom over water but will be going to Florida in a few weeks and would love to get some good early morning shoreline video. I know there's issues with Sonar affecting the drones ability to recognize surfaces over water. So as I understand it, you turn that feature off? My biggest question is when I do turn it off will GPS still hold it steady or is it pretty much manual flying. I guess I'm not sure what to expect . Havnt done it yet ,but really want to lose that fear. I have no problems flying manual . Just unsure how the P3 will react..I have a boat in a marina on Lake Michigan. Would love to get some photography cruising with friends. Any help greatly appreciated!