Please answer the following question: German submarine U-1000 was a Type VIIC/41 U-boat built during World War II for service in Nazi Germany's Kriegsmarine.She was completed in Hamburg in November 1943 and after working up trials was moved to Egersund in Norway in June 1944. From there she conducted her only war patrol in the waters off Norway in the North Sea and towards the Arctic Circle but found no enemy ships to target returning to Bergen without firing a shot. 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