Q:Japanese submarine I-168 - I-168 was a Kaidai class submarine (KD6 Type) of the Imperial Japanese Navy (IJN) during World War II. At the Battle of Midway she sank two American warships: the aircraft carrier USS Yorktown (CV-5) and the destroyer USS Hammann (DD-412). At that time she was commanded by Lieutenant Commander Yahachi Tanabe. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Mean Of Transportation