Mazagon Dock Shipbuilders Limited, Mumbai, an ISO 9001 : 2008 Company is one of the leading shipbuilding and offshore fabrication yards in India. The Yard was established in the 18th century, and over the 200 odd eventful years, has earned a reputation for quality work and established a tradition of skilled and resourceful service to the shipping world in general and the Indian Navy, Coast Guard & ONGC in particular. In its varied history, MDL passed through various ownerships like the P&O lines and the British India Steam Navigation Company. It was incorporated as a Public Limited Company in 1934.