Intrepid is a 12-metre class yacht which won the America's Cup in 1967 and again in 1970.

Intrepid was designed by Olin Stephens, and was built of double-planked mahogany on white oak frames. She featured important innovations both above and below the waterline.

The rudder was separated from the keel and a trim tab was added. This new general underbody type, with relatively minor refinements, was used on every subsequent Cup boat until the 12-metre Australia II's winged keel of 1983.

In 1967 Intrepid was skippered by Emil "Bus" Mosbacher, and defeated Australian challenger Dame Pattie. Redesigned in 1970 by Britton Chance, Jr. and skippered by Bill Ficker that year, she defeated another Australian challenger, Gretel II.

From wikipedia