Model or a dry dock.model of the Dry Dock of Willemsoord, on a boundary. The base shelf shows the composition of the wooden raft on which the dock was built. The dock has an elongated oval shape and a metal ship door with a keel. Four pipes from the bottom are upwards by one of the sides at the entrance; As a result, the water was drained with pumps when the dock was pumped empty. The ship door has a double skin to two-thirds; The inner Caisson is divided into four compartments. Each compartment has a mechanical pump, a soft crane and two sheaves that connect it to the neighboring compartments. There are two hand pumps for the space between double skin. The mechanical pumps are connected to a single drive mechanism, which must be driven by a steam engine; They all connect to two pipes that lead to residents outside the ship door. Cross through the Schipdeur two square channels, which are closed in the middle of a spuischeon, served with a winch inside: these channels are not connected