On my way home from work there is a small beach on Jamaica Bay just east of Coney Island. If the wind is right lot of Kite sailors and windsurfers congregate there, especially on Friday afternoons. One day I grabbed my K20D and the Pentax A 70-210 and stopped off on my way home. Here are a few shots from that.
BTW, I didn't find this particularily easy. Pan, focus, zoom all at the same time. I'm surprised I got as many keepers as I did.
If you want to see more they are here:
saltwater : photos : Kite Sailing
NaCl(I definitely will go back)H2O