Answer the following question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. SM U-9 - SM U-9 was a German Type U 9 U-boat. She was one of 329 submarines serving in the Imperial German Navy and engaged in the commerce war (Handelskrieg) during World War I. Her construction was ordered on 01908-07-15-000015 July 1908 and her keel was laid down by Kaiserliche Werft in Danzig. She was launched on 01910-02-22-000022 February 1910 and commissioned on 01910-04-18-000018 April 1910.
Answer:
Mean Of Transportation