A United States Naval Air Detachment of eleven aircraft assigned to Sandia Base in June 1949 was sequentially renamed the Naval Air Special Weapons Facility (NASWF) in August 1952, the Naval Nuclear Ordnance Evaluation Unit (NNOEU) in 1958, and the Naval Weapons Evaluation Facility (NWEF) in March 1961. Before the NWEF ceased flight test operations in September 1992, nuclear compatibility and safety certification had been completed for 76 versions of 32 different Navy nuclear-capable fighter and attack aircraft. Following accidents aboard in 1966 and in 1967, NWEF applied nuclear safety protocols to develop procedures to safely stow, handle, transport, assemble, disassemble, preload, load, unload, arm, dearm, rearm, and deliver non-nuclear aviation ordnance including bombs, torpedoes, naval mines, missiles and conventional stores from sonobuoys to Air-Delivered Seismic Intrusion Detectors (ADSID).