Reliance Naval and Engineering Limited | 8,305 followers on LinkedIn. Reliance Naval and Engineering Limited (RNAVAL) (formerly Reliance Defence and Engineering Limited / Pipavav Defence and Offshore Engineering Company Limited) (PDOECL) has the largest engineering infrastructure in India and is one of the largest in the world. RNAVAL is the first private sector company in India to obtain the licence and contract to build warships.