The Ton-class were coastal minesweepers built in the 1950s for the Royal Navy but also used by other navies such as the South African Navy and the Royal Australian Navy. They were intended to meet the threat of seabed mines laid in shallow coastal waters rivers ports and harbours a task for which the existing ocean-going minesweepers of the Algerine-class were not suited. 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