USS Delphinus (AF-24) was built in 1915 as SS San Mateo by Workman Clark and Co., Ltd., Belfast, Northern Ireland; acquired by the U.S. Navy 11 August 1942; and commissioned the same day as San Mateo, Lieutenant O. M. Mikkelsen, USNR, in command. She was assigned the name Delphinus on 22 August 1942.
Read more about USS Delphinus (AF-24): World War II Pacific Operations, End-of-War Decommissioning