Dredgers are specialized machines used to remove sediment and debris from the bottom of rivers, lakes, and other bodies of water. They help maintain navigable waterways, allowing boats and ships to pass safely. Dredging can also create new land or deepen existing channels for various purposes, including construction and environmental restoration. There are different types of dredgers, such as cutter suction dredgers and bucket dredgers, each designed for specific tasks. These machines can operate in shallow or deep waters and are essential for managing water resources, improving flood control, and supporting marine ecosystems.