During the century the size of ships being built increased and technologies evolved: in 1852 the first iron ship was launched on Wearside, built by marine engineer George Clark in partnership with shipbuilder John Barkes. Thirty years later Sunderland's ships were being built in steel (the last wooden ship having been launched in 1880). As the century progressed, the shipyards on the Wear decreased in number on the one hand, but increased in size on the other, so as to accommodate the increasing scale and complexity of ships being built.
