Reliance Naval and Engineering Limited operates as an integrated shipbuilding facility in India and internationally. The company designs and constructs offshore patrol vessels, landing platform docks, frigates, corvettes, destroyers, research vessels, submarines, and aircraft carriers; and offers design engineering consultancy services focused on oil and gas and EPC services. It is also is involved in design and process engineering for ships and offshore structures, including stability calculation, hull structural drawings, machineries selection, piping and electrical drawings, structural analysis of marine structures, and engineering and generation of production drawings for ships and offshore structures. In addition, the company integrates third party equipment, such as IBS, IPMS, etc., onto various platforms, as well as undertakes repair and maintenance of various ships and rigs. Further, it fabricates, assembles, and erects heavy engineering products. The company was formerly known as Reliance Defence and Engineering Limited and changed its name to Reliance Naval and Engineering Limited in September 2017. Reliance Naval and Engineering Limited was founded in 1997 and is based in Mumbai, India. As of January 4, 2024, Reliance Naval and Engineering Limited operates as a subsidiary of Hazel Mercantile Limited.