Please answer the following question: USCGC Balsam (WLB-62) - USCGC Balsam (WLB-62) is a 180-foot (55 m) seagoing buoy tender (WLB). A Cactus-class vessel she was built by Zenith Dredge Company in Duluth Minnesota. Balsam's preliminary design was completed by the United States Lighthouse Service and the final design was produced by Marine Iron and Shipbuilding Corporation in Duluth. On 25 October 1941 the keel was laid she was launched on 15 April 1942 and commissioned on 13 October 1942. 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