The very first USS Hatteras was a 1,126-ton steamer purchased by the Union Navy at the beginning of the American Civil War. She was outfitted as a gunboat and assigned to the Union blockade of the ports and waterways of the Confederate States of America. During an engagement with the disguised Confederate commerce raider, CSS Alabama, she was taken by surprise and was sunk off the coast of Galveston, Texas. The wreck site is one of the few listed on the National Register of Historic Places because of its location away from destructive surf and because of the ship's side-wheel design, which marks the transition between wooden sailing ships and steam-powered ships.