NV Ingenieurskantoor voor Scheepsbouw

NV Ingenieurskantoor voor Scheepsbouw, usually shortened to IvS or Inkavos, was a Dutch dummy company set up in The Hague and funded by the German Reichsmarine after the First World War to maintain and develop German submarine expertise while circumventing the limits of the Treaty of Versailles. The company designed several submarine types for paying countries, including the Soviet S class submarine, as well as the prototypes for the German Type II and Type VII submarines.