SS El Sol was a cargo ship built in 1910 for the Morgan Line, a subsidiary of the Southern Pacific Company. During World War I, she was known as USAT El Sol in service with the United States Army and as USS El Sol (ID-4505) in service with the United States Navy. At the end of war, she reverted to her original name of SS El Sol.SS El Sol was one of four sister ships that carried cargo and a limited number of passengers for the Morgan Line. She was acquired by the U.S.