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. USS Haven (AH-12) -  USS Haven (AH-12) was the lead ship of her class of hospital ships built for the U.S. Navy during World War II. Laid down as SS Marine Hawk she was transferred from the Maritime Commission for conversion to a hospital ship and served in that capacity through the end of the war. She was redesignated APH-112 (evacuation transport) in June 1946 for participation in Operation Crossroads returning to her original AP-12 in October 1946.
Answer:
Mean Of Transportation