Please answer the following question: 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. Azteca-class patrol vessel - The 'Azteca-class patrol vessel' are used by the Mexican Navy. They were designed and built by the British companies [T.T. Boat Designs Ltd; Built by Ailsa Shipbuilding Co. Ltd. Scott & Sons Bowling; Lamont & Co. Ltd.] and [Vera Cruz and Salina Cruz] Shipyards for the Mexican Navy in 1976 - 1980. [See Jane's Fighting Ships 1985-1986]. They are multi-role patrol craft with good nautical characteristics.
A:
Mean Of Transportation