Yes we have breakwaters in Kansas. It how we keep the powerboats and logs out of the marina. The one in question is a cut up section of old dock with fins about 4 feet below the water. The ends have jagged pieces of I beam sticking out. Not a good design but we are looking for a new one. When the winds are from the South South east they get funneled up the slot and you get headed sailing out. Yes we sail in and out of our slips in Kansas.