Commander David Hinkle, USN (Ret.) graduated with honors from the U.S. Naval Academy in 1954. He was picked by Admiral Rickover for the naval nuclear program in 1958, and served in six submarines and commanded the nuclear attack submarine Pargo. Called Mr. Sonar by contemporaries, he participated in the development and fleet introduction of numerous sonar and weapon systems, launching more than 500 torpedoes, missiles, and rockets. Commander Hinkle was awarded more than 40 medals and commendations for research, development, test and evaluation of submarine sonar, weapon, and fire-control systems.