USS Arapaho (AT-14/YT-121) was an Arapaho-class fleet tug that performed various tugboat services for the United States Navy. She was constructed in Seattle Washington; however she spent most of her working career on the U.S. East Coast primarily at Norfolk Virginia and Philadelphia Pennsylvania. 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