Over the next few years, "Chivo" continued to specialize in her role as an "opposition force" (i.e. Soviet) submarine during ASW training exercises. These included pretending to launch a ballistic missile at the United States, disrupting "blue force" amphibious convoys or attempting submerged transits against reconnaissance aircraft patrols. In the latter case during Operation DeltEx XV in October 1962, "Chivo" managed to stay undetected during a three-day submerged transit opposed by aircraft from Norfolk and Bermuda. In addition to conducting similar exercises in 1963, the submarine also received a plastic fairwater sail to help with underwater speed during a regular overhaul at Charleston between February and June 1964.