 "Oberon" (AK–56), originally named "Delalba" (MC hull 133), was built at Federal Shipbuilding and Drydock Company, Kearny, New Jersey; renamed "Oberon" 16 February 1942; launched 18 March 1942; sponsored by Mrs. W. Creighton Peet; acquired by the Navy 15 June 1942, commissioned the same day, Comdr.Ion Purcell in command.