USS Rickwood (SP-597) was a United States Navy patrol vessel in commission from 1917 to 1919.Rickwood was built as the private motorboat Ethel M. Ward by the Matthews Boat Company at Port Clinton Ohio in 1910. She later was renamed Rickwood.On 9 June 1917 the U.S. Navy acquired Rickwood from her owner A. H. Woodward of Woodward Alabama for use as a section patrol boat during World War I. She was commissioned as USS Rickwood (SP-597) on 18 June 1918 with Ensign George R. 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?
Mean Of Transportation