Trailer suction dredges are specialized vessels used for underwater excavation. They work by sucking up sediment, sand, and gravel from the bottom of rivers, lakes, or oceans through a large pipe. The material is then transported to a designated location, often for construction or land reclamation projects. These dredges are mounted on trailers, allowing for easy transportation to different sites. They are commonly used in marine engineering, environmental restoration, and mining operations. The design enables efficient removal of materials while minimizing environmental impact, making them a valuable tool in various industries.