 From her arrival at Key West, Florida, on 25 November 1944, until the end of World War II in August 1945, she trained officers and enlisted men in submarine detection, preparing the students to operate the range recorder and attack plotter during antisubmarine warfare operations by destroyers and destroyer escorts.After World War II, "PCS-1386" continued training operations based at Key West.She also participated in naval exercises in the Atlantic Ocean, Caribbean Sea, and Gulf of Mexico between 1946 and 1956.