 In the late 1950s, substantial upgrades followed in order to turn the air station into a Master Jet Base for the carrier-based Douglas A-3 Skywarrior (at the time, designated A3D) nuclear attack aircraft of Heavy Attack Wing ONE (HATWING ONE).In addition to the Skywarrior, other associated sea-based and land-based training aircraft supporting A3D training, such as the F9F-T Cougar and P2V-3W Neptune, were also assigned.The upgrades to the former NAAS to achieve status as a full-fledged NAS and Master Jet Base included lengthening of the main runway to with additional overruns of approximately on both ends; construction of additional new hangars; barracks and administrative support buildings for the air station, heavy attack wing, heavy attack squadrons, and Marine Barracks; installation or upgrades to precision approach radar/ground controlled approach (PAR/GCA), non-directional beacon (NDB) and tactical air navigation (TACAN) navigational aids; a robust storage and distribution system for JP-5 jet fuel (which relied on resupply via a railroad spur into the base); secure weapon/air-dropped ordnance storage facilities; a Navy Dispensary; a Navy Exchange complex and associated garage/service station/MiniMart; and morale, welfare and recreation (MWR) facilities that included a base movie theater, two swimming pools, lakeside recreational facilities and separate clubs for officers, chief petty officer and enlisted personnel pay grade E-6 and below.