Pacific Fleet, 1944–1945

After loading stores, the new submarine tender got underway for shakedown in the waters off New London, Connecticut, and in Block Island Sound. She then took on spare parts and equipment at New London before departing Connecticut on 6 November, bound for the Panama Canal.^[1]

Apollo transited the Panama Canal on 13 November; paused briefly at San Diego, California, for replenishment; and continued on to Pearl Harbor, Hawaii. On 10 December, the ship set a course for Guam, Mariana Islands, and arrived in Apra Harbor 11 days later. She then commenced providing services to various submarines of the Pacific Fleet. Her tour of duty at Guam ended on 10 July 1945, when the vessel got underway to return to Pearl Harbor. Shortly after her arrival, her crew resumed submarine tending activities.^[1]

Following the Japanese capitulation, Apollo set sail on 27 August for the east coast of the United States. She transited the Panama Canal on 12 September and continued on to New Orleans, where she dropped anchor on the 16th. The ship resumed her voyage on 30 October; arrived at Yorktown, Virginia, on 3 November; and began unloading her ammunition. Four days later, Apollo sailed on to New London. Upon reaching that port on the 8th, the tender took up the task of placing submarines of the New London Group, 16th Fleet, in an inactive status.^[1]

Decommissioning , 1946–1974

On 16 October 1946, Apollo was placed in commission, in reserve. She was decommissioned on 12 February 1947 and was berthed at New London. On 1 July 1963, her name was struck from the Navy list, and the vessel was transferred to the Maritime Administration for layup in the James River. She was sold to the Union Minerals & Alloys Corporation for scrapping in 1974.^[1]