A Cutter Suction Dredger (CSD) is a type of hydraulic dredger that uses a rotating cutter head to loosen and lift hard materials like rock, clay, and silt, then sucks them up and transports them via pipelines for projects like port development, land reclamation, and waterway maintenance.

Hopper barges are vessels specifically designed to transport bulk materials like sand, gravel, coal, and dredged materials efficiently across waterways, especially where other forms of transport are impractical or costly.

Survey boats, also known as survey vessels or hydrographic survey vessels, are used to collect data for mapping underwater topography, identifying navigational hazards, and producing high-precision charts.