The Ideal 18 keelboat was designed by Bruce Kirby as a strict one-design, accessible to sailors of all ages, weights, skill levels and competitive backgrounds. The emphasis is on strategy, tactical skills and boat-handling, rather than tuning or special rigging. The 3/4 fractional sloop rig has no permanent or running backstays; instead, rig stability is generated by 15 degree swept spreaders and a large cross-section mast. The jib is self-tacking and roller-furling. The Ideal 18 is used in the Robie Pierce Regattas, and the boat is sold by Shumway Marine.