Our seabed is filled with dunes, troughs and other irregularities. That is why interventions are necessary when installing offshore structures. To ensure a stable base, the seabed is first ‘prepared’. We do this by dredging dunes, levelling the surface and, if needed, placing a first layer of gravel. Pipelines and cables are preferably installed under the seabed. For this, we excavate special trenches that start at sea, may pass across the foreshore and end on land.
