Given the question: Ice Boat No. 3 - City Ice Boat No. 3 commonly known as Ice Boat No. 3 or just No. 3 was a municipal sidewheel icebreaker built in 1873 to assist in keeping Philadelphia's waterways free of ice during the winter months. The vessel was also used for occasional excursions and other duties through the rest of the year.During the SpanishAmerican War Ice Boat No. 3 was briefly commissioned into the U.S. Navy as the coastal patrol vessel USS Arctic before returning to her normal duties under her original name. 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?
The answer is:
Mean Of Transportation