CSL OWL Subsea Rock Installation is building two 17,500-tonne DP2 vessels with methanol-ready engines to support precise subsea rock placement for offshore renewable energy projects.
Each vessel will have a cargo capacity of 17,500 metric tonnes and will be equipped with dynamic positioning (DP2). They will be able to operate on marine gas oil (MGO) and/or methanol, providing a pathway to zero emission operations. According to the company, these vessels will deliver efficient and cost-effective subsea rock installation services in water depths up to 100 metres.
Vessel highlights
- Capable of installing rock material up to the 60/300 kg grading, with the option of handling rocks weighing up to 450 kg.
- A Tremie Pipe with active motion compensation ensures placement at water depths between 30 and 100 metres.
- The transport belts are designed to handle rocks weighing up to 1,500 kg, with a side chute available for larger armour gradings.
- Excavators can be used to handle larger amour rock.
We are committed to providing tailormade capacity to the fast-growing offshore renewable sector. This will support the sectors’ ambitions of ramping up installed capacity, reducing the levelized cost of energy (LCOE) and minimizing emissions,
… said Maarten van der Giessen, CEO of CSL OWL SRI.
The first subsea rock installation vessel is scheduled for delivery from the shipyard in August 2026, followed by the second vessel in November 2026.
