Estaleiros Navais de Viana do Castelo (ENVC) is a medium sized shipyard in business since 1944, located in the town of Viana do Castelo, on the Atlantic Coast in the very north of Portugal. Occupying an area of 400.000 sqm and employing 625 people, it is a major Portuguese shipbuilder. In 2013 it's assets and operations are sub-licensed to Martifer and its employees are to be laid off.