The Type 206 class gunboat is a gunboat of the People's Republic of China's People's Liberation Army Navy. Also known as the Huludao class it is a simplified version of the Type 037 class submarine chaser (also known as the Hainan class). Used for patrol duties it has slightly reduced displacement but has an enlarged superstructure. 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