USS T-2 (SS-60/SF-2) was an AA-1-class submarine in the service of the United States Navy; T-2 was also known as AA-2.She was laid down as AA-2 on 31 May 1917 at the Fore River Shipbuilding Company yard in Quincy Massachusetts by the Electric Boat Co. of New York launched on 6 September 1919 sponsored by Miss Madeline Everett redesignated SF-2 on 17 July 1920 renamed T-2 on 22 September 1920 and placed in commission at the Boston Navy Yard on 7 January 1922 with Lt. 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