Thanks for your concern pal. I have plenty of flight time. I was asking for more detailed info about battery consumption between sport and regular mode. The flight round trip will be approx 15840ft. Round trip. I have several flights in excess of 26000 feet. My typical battery life is around 23 minutes with a max flight of 27 minutes. I know the drone will make the flight and back, just looking for input flying in a mode that I don't use often. The only reason I said dangerous is that if I have any problems, the entire flight is over open ocean and recovery would be impossible. I have had many shorter flights over water.