Why can't you see a boat 15 miles away from shore? Wow smart guy, I can hardly ever see anything when its 15 miles away! Dust is often present at concentration levels of over 400ppbv, meaning that over a 15 mile distance, there would be at least 3.168x10^7 particles in between you and a boat in the distance. Begging your pardon, but I'm amazed with the amount of smog in the air these days that you can even see mountains or whatnot, let alone a dingy.
The rest of your arguement makes no sense. When was the last time you had a flat board long enough to stretch from hawaii to california? Yeah, thats what I thought. What if, what if, what if. Keep bringing the arguements buddy, we'll keep debunking them.