SS Clan Macwhirter was a British cargo steamship. She was built in 1918 as Ypresville in the First World War and sunk by enemy action in 1942 in the Second World War. In her 24 year career she also carried the names Halizones and Willcasino. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Mean Of Transportation