A cutter suction dredge is a type of marine construction equipment used for underwater excavation. It features a rotating cutter head that breaks up soil and sediment, which is then suctioned through a pipe and transported to a designated location. This method is effective for deepening rivers, harbors, and canals. These dredges are often used in dredging projects to maintain navigable waterways and create new land. They can operate in various water depths and are equipped with powerful pumps to handle different types of materials, including sand, silt, and clay.