A 5,500 m³ trailing suction hopper dredger (TSHD) is a versatile self-propelled vessel designed for port construction, maintenance, and land reclamation projects. Its main function is to remove sediments such as sand, silt, and clay from seabeds and riverbeds, transport the material, and dispose of it at designated locations or use it for beneficial purposes like beach nourishment.The core feature of this dredger is its trailing suction system. One or two drag arms, fitted with dragheads, are lowered to the seabed while the vessel is sailing at low speed along a pre-determined dredging track. Powerful dredge pumps create suction, drawing the loosened material and water mixture through the suction pipes into the hopper. The dragheads are equipped with adjustable visors and water jets to optimize penetration into different soil types and to control the intake of oversize material.The hopper, with a capacity of around 5,500 cubic meters, serves as the onboard storage space for dredged material. During loading, the mixture of sediment and water flows into the hopper, where the heavier solids settle while excess water overflows through adjustable weirs. This process allows for a higher concentration of solids in the hopper, improving transport efficiency and reducing the number of trips required.Once the hopper is filled, the vessel proceeds to the designated disposal or placement area. Several discharge methods are typically available. For offshore disposal or deep-water placement, bottom doors or split-hull systems allow rapid dumping of the load directly to the seabed. For land reclamation or beach nourishment, the vessel can pump the material ashore through a floating and submerged pipeline, using either the main dredge pumps or dedicated shore-discharge pumps and booster systems. In shallow areas, rainbowing can be used, where a high-velocity jet of sand-water mixture is projected in an arc from the bow or side of the ship to build up new land or restore beaches.The vessel is usually equipped with modern navigation and dredging control systems, including differential GPS, dredge monitoring software, and survey equipment. These tools provide real-time information on dredging depth, position of the dragheads, hopper loading status, and seabed profiles, ensuring accurate excavation and efficient volume control. Automation of the dredging process enhances safety, repeatability, and production rates.Propulsion and maneuvering systems are designed for precise control in confined port areas. A combination of main propellers, bow thrusters, and sometimes azimuth thrusters allows the dredger to maintain an accurate track along the dredge line and to operate safely near quays, breakwaters, and other marine structures. The hull form is optimized for both dredging stability at low speeds and economical sailing when loaded or in ballast.Environmental considerations are integrated into the design and operation. Overflow systems can be managed to reduce turbidity, and dragheads may be fitted with devices to limit the resuspension of fine particles. Compliance with international regulations for emissions, waste management, and underwater noise is taken into account to minimize the environmental footprint.Overall, a 5,500 m³ TSHD combines efficient excavation, transport, and placement capabilities in a single mobile platform, making it highly effective for medium-scale port deepening, channel maintenance, and coastal development projects worldwide.