SS Aquarama was built as Marine Star, one of five breakbulk cargo ships of the United States Maritime Commission (USMC) type C4-S-B5 having that C4 design variant. The ship was delivered to the War Shipping Administration (WSA) for operation in July 1945 just before the end of World War II and was operated until August 1946 by WSA's agent American Hawaiian SS Company. From September 1947 the ship was laid up except for brief periods in the James River. In 1952 the ship was converted into the largest passenger ship ever to operate in the Great Lakes.