Kirby designed Norwalk Islands Sharpies, a line of high powered, shallow-draft sailboats from 18 ft. to 41 ft. The designs use modern plywood, fiberglass and epoxy construction. The Sonar is the largest of three classes used in Paralympic sailing. Kirby was also part of the international committee elected to create the IACC boats (International America's Cup Class) used in the America's Cup between 1992 in San Diego and 2007 in Valencia, Spain.