Q:USS Vindicator (1863) was a 750-ton steamer acquired by the U.S. Navy and put to use by the Union during the American Civil War.Vindicator served the Union Navy primarily as a ram on the Mississippi River and its tributaries as part of the Union effort to control the Mississippi River and essentially divide the Confederate States of America in half. Vindicator was also equipped by the Navy as a gunship with a number of powerful guns installed on board. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Mean Of Transportation