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. Finnish coastal defence ship Ilmarinen - Ilmarinen was a Finnish Navy Panssarilaiva (Armored ship; a coastal defence ship by British classification). The unit was constructed at the Crichton-Vulcan shipyard in Turku Finland and named after the mythological hero Ilmarinen from the Finnish national epic the Kalevala. Ilmarinen was the flagship of the Navy from 1 May 1933 until her demise on 13 September 1941.
A:
Mean Of Transportation