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. Original units were powered by Paxman diesels of either or . Original units were named with pre-Hispanic tribal names.