Underwater Survey of Arizona Wreck

National Park Service (NPS) survey of ex-USS Arizona (BB-39). The top drawing, made based on 1986 dives, refined the two bottom drawings made from data collected in 1984. Surveyors were surprised to find the 14-inch (360mm) guns of turret I in place; they were told that all weapons were removed. The survey found damage consistent with an explosion deep within the ship; the surrounding water and the armored hull directed the force of the explosion upward. Until this survey in the 1980s, little archeological work had been done on the wreck since salvage concluded in 1943. NPS divers found live ammunition from the raid on Pearl Harbor and chrome piping from previous memorials from the 1950s on Arizona's deck. The teak decking was still intact in some places.