CSS Arctic was a Confederate ironclad floating battery converted from USS Arctic at Wilmington, North Carolina in 1862. Confederate forces seized USS Arctic at the beginning of the war and converted into a receiving ship. Arctic was a 328-ton screw steamer built in Philadelphia in 1851 at the navy yard by Theodore Birely. The two-decked, three-masted steamer measured 121 feet (37 m) in length, 24 feet (7.3 m) in beam, and 12 feet (3.7 m) in depth and displaced 125 tons.