The A1D Skyraider was the last single-engine piston-powered aircraft designed by the venerable Douglas Aircraft Company. It was also the last single-engine piston-powered combat aircraft in the U.S. arsenal. Flown by the Navy, Marines and Air Force (where it was known as the 'Spad'), the Skyraider was one of the finest piston aircraft ever designed and certainly the finest piston-powered attack plane ever produced. Able Dogs is a tribute to the plane and "the men who designed her, flew her, maintained her, and those who otherwise had a hand in her Naval Aviation career".