Reliance Naval and Engineering Limited (R-Naval), formerly known as Reliance Defence & Engineering Limited and prior to that as Pipavav Shipyard Limited and Pipavav Defence & Offshore Engineering Company Limited is an Indian shipbuilding and heavy industry company headquartered in Mumbai. The shipyard is located in Pipavav, Gujarat, at a distance of 90 km South of Amreli, 15 km South of Rajula and 140 km South West of Bhavnagar. R-Naval is the first private sector company in India to obtain a license and contract to build warships. Piavav is the largest shipyard in India.