During the summer of 1961, "Marsh "and her reserve crew were ordered activated for a one-year period. She was recommissioned on 15 December, and on 6 January 1962, she sailed for her new home port, Pearl Harbor. On 10 February, she departed Hawaii for deployment in the western Pacific. Operating out of Subic Bay, "Marsh" conducted training exercises for and patrolled with units of the South Vietnamese Navy, from 18 March to 21 May. She returned to Long Beach on 17 July, and on 1 August, she was again placed in service, in reserve. Reassigned as a Naval Reserve training ship at the same time, she continued this duty into 1969.