Please answer the following question: Oruc Reis-class submarine - The Oruc Reis class submarines were ordered by the Turkish Navy from the British company Vickers in 1939. They were similar to the British S class submarines but slightly smaller. They had the S class machinery but only four bow torpedo tubes. The four boats were requisitioned by the Royal Navy on the outbreak of World War II and fought in the British fleet as the P611 class. 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