IN Brief:
- Boskalis is investing in a 24,000-tonne high-capacity cable-lay vessel for offshore wind and interconnector work.
- The vessel will feature two 12,000-tonne cable carousels, including a concentric carousel.
- Entry into service is expected in 2029, targeting long-distance HVDC cable installation demand.
Boskalis is investing in a new high-capacity cable-lay vessel designed for long-distance cable installation across offshore wind and interconnector markets.
The vessel will be configured with two 12,000-tonne cable carousels, including a concentric carousel, giving it total cable carrying capability of 24,000 tonnes. It is expected to enter service in 2029 and will target projects involving high-voltage direct current cable systems, offshore wind export infrastructure, and cross-border interconnectors.
The design supports installation of longer continuous cable sections, reducing the number of offshore joints required during installation. Fewer joints can improve installation efficiency and support long-term cable integrity, particularly on long routes, deeper water projects, and technically demanding offshore campaigns.
Boskalis already operates three cable-lay vessels, a trenching support vessel, and a portfolio of trenching equipment. The company has more than 15 years of subsea cable installation experience and has worked on more than 140 cable-related projects. Its wider offshore energy capability includes survey, dredging, seabed preparation, cable laying, trenching, and rock installation.
The new vessel adds capacity to a market that is becoming more constrained as offshore wind projects grow in scale and interconnectors become more strategically important. HVDC links are being used to move larger volumes of electricity over longer distances, making cable manufacturing, marine installation, burial, and protection part of the critical path for grid expansion.
Offshore wind delivery already shows how marine construction and grid infrastructure are converging. Ørsted’s Hornsea 3 project has installed its first monopile foundation, starting a 197-foundation programme for the 2.9GW UK offshore wind farm. The generation assets are only one part of the build. Array cables, offshore substations, export cables, landfall works, converter stations, and grid interfaces all need to be sequenced around vessel availability and weather windows.
New UK approvals are adding further pressure to the offshore transmission supply chain. Dogger Bank South and North Falls have secured consent, bringing up to 4GW of future offshore wind capacity closer to delivery. Projects of that scale require early planning for cable routes, substations, marine surveys, installation slots, and connection interfaces.
The same pressure is visible in mainland Europe. Poland’s offshore wind buildout has advanced through transmission contracting, with PSE awarding offshore wind transmission line contracts to support grid connection infrastructure. As Poland, Germany, the Netherlands, the UK, and other markets expand offshore wind and interconnector capacity at the same time, the pool of suitable vessels becomes a limiting factor.
Developers and transmission owners are responding by securing vessel slots, cable supply, route preparation, and installation contracts earlier in project schedules. Delays in cable installation can leave completed offshore assets waiting for export routes, while delays in export systems can reduce the value of installed generation capacity.
Boskalis’ investment therefore responds to both technical and programme risk. The ability to carry and install longer cable lengths can reduce offshore jointing, support reliability, and improve installation efficiency. At the same time, additional high-capacity vessel availability strengthens a supply chain that is increasingly exposed to overlapping project schedules.
By 2029, the European offshore wind and interconnector pipeline is expected to be larger, more complex, and more dependent on HVDC cable installation capacity. The new Boskalis vessel adds another specialist asset to that market, while also signalling how closely offshore generation growth is now tied to subsea transmission delivery.