USS Pocahontas (SP-3044) was a transport ship for the United States Navy during World War I. She was originally the SS Prinzess Irene a Barbarossa-class ocean liner built in 1899 by AG Vulcan Stettin of Stettin Germany for the North German Lloyd line.At the beginning of World War I the ship was in New York and was interned by the United States. She was seized when that country entered the conflict in 1917 and converted to a troop transport. 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