"Denebola" sailed from Norfolk on 24 July 1944 for duty in the Mediterranean, furnishing tender services at Cagliari, Sardinia, during the invasion of southern France. She continued this duty at Ajaccio, Corsica, and St. Tropez, France, until 23 September when she put into Naples for tender duty until 27 October. She returned to Casco Bay, Maine 1 December. Arriving at Boston 30 April 1945 for repairs, "Denebola" got underway 13 May for the Pacific, arriving at Eniwetok 30 June. She provided upkeep and repair services to destroyers and other ships until 6 November when she sailed for San Diego, arriving 26 November. She aided in preparing ships for decommissioning until 14 February 1946 when she got underway for San Francisco. "Denebola" was decommissioned there 10 April 1946 and transferred to the Maritime Commission for disposal 1 July 1946.