Built in 1898, by Newfie and Levy, Ship and Engine Building Company of Philadelphia, Pennsylvania as the DeWitt C. Ivins for the Moran Towing Company of New York, New York.
In 1915, the tug was acquired by the Standard Transportation Company of New York, New York. Where she was renamed as the S.T. Co. No. 7.
In 1917, she was transferred to the the Socony Vacuum Oil Company of New York, New York. Where the tug was renamed as the Socony 7.
In 1943, the tug was acquired by the Independent Pier Company of Philadelphia. Where she was renamed as the Mercury.
The tug was later acquired by Comapss Marine Incorporated of Philadelphia, Pennsylvania. Where the tug retained her name. She is no longer listed in documentation. Her current, and or final disposition is unknown. She was a single screw tug, rated at 1,700 horsepower.