From September 1961 to February 1962, The Sullivans underwent a major overhaul in the Boston Naval Shipyard. She proceeded to Guantanamo Bay soon thereafter to train for duty as a school ship. She subsequently served as a model destroyer in which officer students could see and learn the fundamentals of destroyer operation. In May and again in August, The Sullivans made training cruises to the Caribbean for the Destroyer School.
