USS South America was used to block ports and waterways on states commonly referred to as what?
USS South America (1861) USS "South America" (1861) was a whaler purchased by the Union Navy on 9 November 1861 at New London, Connecticut. She was acquired to be sunk as an obstruction in the channel leading to a Confederate port as part of the Union blockade on ports and waterways of the Confederate States of America.
USS Port Royal (1862) USS "Port Royal" (1862) was a double-ended gunboat built for the U.S. Navy during the American Civil War. The vessel was assigned to patrol the rivers and other waterways of the Confederate States of America and to enforce the Union blockade on the South.