Patterson was built at Westwego, Louisiana by Avondale Shipyard. She was commissioned on 14 March 1970, conducted shakedown training out of Guantanamo Bay, Cuba, and in June and August 1971 made her first overseas deployment, a trip to northern Europe. Her next deployment, to the Mediterranean Sea for service with the Sixth Fleet, took place during the first half of 1974. When all newer escort ships were reclassified as frigates in mid-1975, Patterson became FF-1061. At about this time she was also updated, receiving enlarged helicopter facilities and the Basic Point Defense Missile System, whose launcher for eight "Sea Sparrow" guided missiles was installed on her afterdeck.