CSL OWL Subsea Rock Installation (CSL OWL SRI), a partnership between The CSL Group (CSL) and Offshore Wind Logistics (OWL), has announced the construction of two innovative subsea rock installation vessels designed for the offshore renewable energy sector.
Each vessel, with a cargo capacity of 17,500 metric tonnes, will feature dynamic positioning (DP2) systems for precise operations in water depths up to 100 meters. They will run on marine gas oil (MGO) and/or methanol, advancing toward zero-emission operations. The vessels are designed to handle rock material up to 450 kg and feature a Tremie Pipe with active motion compensation to ensure accurate placement in varying ocean conditions.
These vessels will provide flexible and cost-effective subsea rock installation services, crucial for the construction and maintenance of bottom-fixed wind farms and subsea cables. Their advanced capabilities will improve operational efficiency, reduce the levelized cost of energy (LCOE), and contribute to lowering emissions.
Maarten van der Giessen, CEO of CSL OWL SRI, highlighted the company’s commitment to supporting the offshore wind sector’s growth, stating, “Our solutions are designed to enhance flexibility and cost efficiency, making green energy more affordable and helping to reduce emissions.”
The first vessel is set for delivery in August 2026, with the second to follow in November 2026. CSL OWL SRI’s vessels aim to lead the way in optimizing offshore renewable energy logistics and supporting the global transition to sustainable energy.
