Q:Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Hiuchi-class support ship -  The Hiuchi class support ship is designed to provide Auxiliary Multi-purpose Support (AMS) for the Japanese Maritime Self-Defense Force (JMSDF). The Hiuchi AMS class replaced the Auxiliary Service Utility class (ASU). The primary mission of these vessels is to support training exercises of other ships including shooting practice and torpedo launching practice.
A:
Mean Of Transportation