Explore our portfolio of Construction Service and Service Operation Vessel designs.
Ulstein’s service operation vessels (SOVs and CSOVs) are purpose-built to support the full lifecycle of offshore wind farms and energy infrastructure. Whether it’s wind farm maintenance, cable installation support, or safe and efficient crew transfer, our vessels are engineered to deliver reliable performance in demanding marine environments.
Operators benefit from reduced fuel consumption, enhanced operability, and improved safety—especially in harsh weather conditions. Our designs prioritise crew comfort, operational uptime, and environmental responsibility.
Key innovations include the patented X-BOW® and TWIN X-STERN® hull forms, which reduce slamming and improve seakeeping, as well as hybrid propulsion systems that lower emissions and fuel costs. Our vessels are available with either DP2 or DP3 dynamic positioning systems, depending on the configuration, to ensure precise station-keeping during walk-to-work operations.
Cutting-edge solutions that optimise vessel performance and enhance operational efficiency.
Turning visions into realities motivates us to keep pushing for progress in the maritime industry.
You can learn more about how we work with our customers to achieve their visions through our stories.
Ulstein Verft has delivered Nexans Electra, a DP3 cable‑laying vessel (CLV), to Nexans. The vessel further strengthens Nexans’ capacity to support the global energy transition by installing advanced subsea power and communication cable systems.
The conversion of Olympic Notos has now been completed at Ulstein Verft. Following a period of offshore testing and final tuning, the vessel will soon be ready to commence operations.
Aftermarket services by the Ulstein Verft yard are also carried out at other sites. Recently, Area Sales Manager Aftermarket, Hans Ole Låbakk, and a service team carried out necessary work on board Hurtigruten’s vessel Trollfjord in Bergen.
Vessel conversions and re‑mobilisations demand more than drawings and calculations. Recent work on Orient Adventurer, now being prepared for cable-laying operations, demonstrates how critical in-depth knowledge of a vessel’s operational history is to deliver safe, class-approved solutions. Through Ulstein’s aftermarket services, we support complex vessel upgrades with engineering, stability, and weight expertise, including planning and executing inclining tests for conversion and life‑extension projects.
On Tuesday, 24 March, a large-scale rescue exercise was carried out off the coast of Lofoten, Norway, testing a new emergency towing system for ships. The cruise vessel MS Spitsbergen, with 150 passengers on board, the Norwegian Coast Guard vessel KV Barentshav, and the 330 Squadron’s SAR Queen rescue helicopter took part.
How can you be confident that a new vessel design will actually perform in rough seas and demanding operations? The answer lies in thorough verification, independent testing and documented performance. Recently, a new Ulstein design for a cable-laying vessel was tested in a large-scale ocean basin at SINTEF Ocean. The results delivered exactly what Ulstein seeks: confidence that the design performs as intended.
On 11 March 2026, Ulstein Verft, Norway, delivered the Windea Carnot, a Commissioning Service Operation Vessel (CSOV). The vessel was built on behalf of an institutional investor and has now been handed over to its new owner, Bernhard Schulte Offshore (BSO).
Ulsteinvik, Norway, 10 March 2026 – Jan De Nul has selected a customised vessel design from Ulstein Design & Solutions AS for its latest addition to its offshore fleet. The realisation of the trenching vessel marks a milestone in the collaboration between two leading maritime innovators. The vessel is scheduled for delivery in 2028. The basic design is based on a robust and globally proven subsea vessel design.
As offshore oil and gas developments become more complex, operators are rethinking how fields are designed, operated, and supported. For Aker BP, this shift is clearly visible in the Yggdrasil development, the largest ongoing project on the Norwegian Continental Shelf.
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