The Hydac group has delivered the active heave hydraulic system, the active heave winches, the diesel driven hydraulic power unit, the bulk tank, the gas station and the control system for a water injection dredger. The system got a design approval by Bureau Veritas.
Water injection dredgers are often used in small, shallow ports and marinas because they have good manoeuvrability and can dredge very close to embankments and quay walls. An injection beam located underneath the vessel injects large volumes of water under low pressure into silt or fine sand in order to re-suspend it. The sediment mixture turns into a density current, which is then removed with the help of gravity.