Imtech Marine signed a contract to be involved in the execution of the capability upkeep program Walrus-class submarines (IP-W) of the Royal Netherlands Navy. The Dutch Defense Materiel Organization granted Imtech Marine Netherlands the assignment to carry out the mechanical, engineering and electrical upgrade works on board the submarines. The assignment will be carried out at the Naval base in Den Helder and will run from 2013 until 2020. IP-W includes a large number of modifications, such as disassembly, assembly and installation of a variety of equipment and systems.