Federal Shipbuilding and Drydock Company
"Diphda" was launched 11 May 1944 by the Federal Shipbuilding and Drydock Company, Kearny, New Jersey, under a Maritime Commission contract; sponsored by Mrs. Anna Rosenberg; transferred to the Navy on 7 July 1944; and commissioned the next day, Lieutenant Commander R. C. Willson, USNR, in command.