Answer the following question: USS Richard S. Bull (DE-402) was a John C. Butler-class destroyer escort acquired by the United States Navy during World War II. The primary purpose of the destroyer escort was to escort and protect ships in convoy in addition to other tasks as assigned such as patrol or radar picket. She was named in honor of Ensign Richard S. Bull (19131942) who was awarded the Distinguished Flying Cross. 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?
Answer:
Mean Of Transportation