As for the airplane, when I flew one and then spawned a new one, I could not start the engine. It was off, and I would press the start engine button and it would spin up and then down again. Also when I went back to UFO mode the airplane sound would play occasionally regardless of whether I was near the airplane or in orbit. Maybe something you may want to look into.
As for the water, I have always been a huge fan of CG water, and this water is so amazing it almost literally brought a tear to my eye. Fantastic work! The waves are unbelievable!