Please 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. Port Victoria P.V.9 - The Port Victoria P.V.9 was a British single-seat biplane floatplane fighter of the First World War. Although claimed to be the best aircraft of its type yet to be tested only a single prototype was built.
A:
Mean Of Transportation