Catamaran with standard two line bridle. I think it was the location close in. We were second row from the shore. Boat seemed two have kind of its own. No issue night one but last night I think the wind shifted about 15 degrees and was light. When I went up top to see what was going on, sometimes we were face to face with the next boat. I will go with back winded and stay on a ball further out next time. Longer dinghy ride, but better nights sleep.