McDonnell Douglas received a U.S. Navy contract to develop the guidance system for the Tomahawk cruise missile in 1975. Flight tests of the guidance system in 1976 required only 13 of 27 planned development flights to accomplish all its test goals. In 1982 the company won a contract to build complete missile bodies, joining General Dynamics as a dual source cruise missile producer. More than 1,000 Tomahawk missiles were produced by McDonnell Douglas between 1983 and 1995.