Following outfitting and shakedown "McCloy", assigned to Escort Squadron 10, reported to her home port, Newport, Rhode Island, in January 1964. In October, after further specialized training, she commenced training sonar technicians. Employed primarily as a schoolship throughout 1965, she also tested new anti-submarine warfare (ASW) weapons systems for the Operational Test and Evaluation Force. During this period she enhanced her training and testing capabilities as well as her operational abilities by participating in joint United States-Canadian exercises in the spring and fall and in ASW exercises at the end of the year.