Boat U.S. does not understand beach catamarans or dingys. They want powerboats, powerboats, more powerboats, and an occasional high dollar sail boat. I shopped extensively for insurance for my last boat and Boat U.S. took three weeks to call me back and say "Ohhhh...O.K. we figured out what kind of boat you have". Contact State Farm, Prudential, or Progressive for insurance on a beach cat - you'll find the contact pleasant, quick, friendly, and understanding. If you do have a boat on the ISAF one design list, look at insurance through U.S. Sailing...they were competitive with what I had. I set up insurance for a 1984 Hunter 23 and a 2004 Nacra F18 in one phone call with Progressive and I didn't have an account or had ever done anything with them before.