This is a sad story, but I hope in sharing it that somebody's life can be saved. My father was out on his boat this weekend, and on his way back to the dock, he saw a jet ski with no rider, and a man in the water not far from it with no life jacket. He didn't look like he was in any kind of trouble; he was not shouting for help or struggling or anything like that, so my father assumed he just jumped in the water to cool off. My father says he was no more than 50 feet from the guy as he went by. My father went back out to his boat yesterday to make some repair before taking my brother and his friends out to see fireworks. They were dredging for the jet ski man's body. My father is beating himself up over this because he could have saved this man's life if only he had realized he was in trouble. He expected somebody drowning to look like they do in the movies. One of the key signs that somebody is drowning is that they DON'T look like they do in the movies. They're not thrashing around or calling for help or struggling. This article describes what drowning DOES look like: http://gcaptain.com/drowning/?10981 And here are some tips on exactly what to look for, from the same article: I hope the opportunity for you to use this information never happens, but if it does, I hope this saves a life.