HMS Bryony was an Anchusa-class sloop of the Royal Navy built at the yards of Armstrong Whitworth and launched on 27 October 1917. She was used to escort convoys during the First World War and in common with other ships of her class was disguised as a merchant vessel known as a Q-ship. 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?
The answer to this question is:
Mean Of Transportation