I agree about the diver flags. Seen it myself where people had no clue what the flag meant. I also agree that 911 will bounce off of other cell phone towers and that's what I would do. I have also stopped to help peole who waved me down. Actually twice I have had people fill my boat with fuel for simply pulling them in when they ran out. I was just trying to be nice but a full tank of gas was pretty nice. Almost everyone will help someone waving them down and the arms waving will probably be more visible. My final comment, I work for the government and we infringe to much already. I personally don't support it.
"You should have been here yesterday!!!
Jigboy