From: Dictionary of American Naval Fighting Ships

In Greek mythology, Callisto is a nymph attendant on Artemis.

LST-966 was reclassified AGP-15, 14 August 1944, and assigned the name Callisto . She was launched 29 November 1944 by Bethlehem-Hingham Shipbuilding Co., Baltimore, Md.; and commissioned 12 June 1945, Lieutenant Commander C. W. Brooks, USNR, in command.
Callisto sailed from Yorktown, Va., 23 July 1945, bound for the Pacific and service with the 7th Fleet. Delayed at Pearl Harbor by the cessation of hostilities, she reported at San Pedro Bay, P.I., 15 October to serve as tender to Motor Torpedo Boat Squadron 9, busy with the varied tasks given these speedy craft as normal life was restored to the Philippines. Callisto provided berthing, maintenance, and supply facilities for her assigned squadron until 20 December when she cleared for San Francisco. She was decommissioned 9 May 1946, and transferred to the Maritime Commission 14 May 1948.