Assigned to Submarine Squadron Twelve (SubRon 12) upon her return to Key West, the submarine resumed her familiar training routine with the Fleet Sonar School interspersed with port visits to Havana, Cuba; Montego Bay, Jamaica; and Port-au-Prince, Haiti. Aside from a three-month overhaul at Philadelphia between January and May 1953, "Chivo" remained in the West Indies until October when the submarine transited the Panama Canal for a month of operations off the Pacific coast of Colombia. This training period continued until May 1954 when the boat began a four-month regular overhaul at Charleston Naval Shipyard. She again returned to Fleet Sonar School duty in September, with such employment put on hold in March 1955 for a ten-week battery renewal restricted availability. In a change to her normal schedule, the submarine visited Gulfport, Mississippi, in March 1956 and New York City in August of that same year. After another visit to Gulfport in January 1957 to train reservists, and Santiago de Cuba in February, "Chivo" commenced an overhaul at Charleston Naval Shipyard in March. Returning to normal duty out of Key West in September, the boat remained there save for the occasional port visit to Gulf Ports until transferred to Charleston and Submarine Squadron Four in July 1959, a shift completed after a short cruise north to Boston, and Quebec City, Canada the previous month. "Chivo" resumed her familiar ASW services out of Charleston shortly thereafter, a duty she continued in January 1960 with ASW services to patrol aircraft off Bermuda. She followed that with another overhaul at Charleston Naval Shipyard between March and September, with repairs and modifications that included a new sonar system.