Shipboard torpedo and naval gunnery systems are also integrated. They were responsible for towing targets for antiaircraft gunnery and radar tracking practice. The other three U.S. battleships also had difficulty, equipped with less advanced gunnery radar. Aldrin was assigned as an aerial gunnery instructor at Nellis. By this time, advances in naval gunnery had reduced "Hood"s usefulness. He was posted to HMS "Psyche" and received specialist training in torpedoes, gunnery and navigation. One practical application was ballistics in gunnery. He also appeared in public service announcements in the role of Gunnery Sergeant Carter. There, Hartmann learned combat techniques and gunnery skills. He was accepted and underwent training at the Aerial Gunnery School in Cazaux, Gironde. Later in the 1950s new and more capable radars for navigation and gunnery were fitted. Nellis AFB's operation of the Nellis Air Force Gunnery and Bombing Range. Her anti-aircraft (AA) gunnery was augmented by eleven Oerlikon 20 mm cannons. Afterward, he was assigned to the gunnery training ship . Anti aircraft gunnery was a difficult business.