Cable trenches and pipelines

The construction of large offshore wind farms and their associated transformer stations requires cables to be buried in the seabed for protection. Large subsea cables for data transmission between regions and countries must also be buried in the seabed. We have carried out projects involving the excavation of kilometers of cable trenches and their subsequent backfilling.

With our versatile fleet, we can excavate cable and pipeline trenches at depths ranging from -1.5 to -20 meters. We also operate two Multicats, with their cranes and spacious decks, they serve as ideal support vessels for divers, cables, diffusers, and other equipment during cable and pipe laying operations.

All our vessels are equipped with a PDS dredging system, ensuring that trenching and backfilling are carried out with high precision.

In addition to the PDS dredging system, we also utilize two PDS BargeVision systems.

BargeVision is installed on the dredger, enabling the operator to scan, monitor, and document their work in real-time. For instance, if a trench requires steep side slopes, the operator can continuously monitor the trench to prevent collapse; likewise, excavated material that has been side-cast can be surveyed and visualized immediately, making the subsequent backfilling process quick and easy.

Once the operator has backfilled a section of the trench, the area is scanned again to verify that all materials have been removed and the trench is fully backfilled.

All scans are subsequently delivered to the client as a comprehensive survey covering the entire dredged cable route.