Explore our portfolio of subsea support vessel designs.
Subsea support vessels encompass a variety of specialised ships designed to support various operations related to subsea construction, maintenance, and exploration. These vessels are tailored for specific tasks and environments in the offshore energy industry.
Our designs give high functionality, large work deck and equipment-carrying capability and good seakeeping abilities to ensure high operability under harsh weather conditions, high transit speed and low fuel consumption.
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.
In October 2025, Edda Freya called at Ulstein Verft for a mobilisation on very short notice. In addition to several minor tasks, the vessel’s 350-tonne crane needed to be relocated.
The total number of walk-to-work (w2w) vessel designs and redesigns by Ulstein now counts 22, of which 16 are currently in operation. On average, these vessels perform repair and maintenance on more than 5,000 turbines every year! That makes a stunning 95,000+ gangway connections!
With the delivery of Douglas Mawson on 9 September 2025, the seventh vessel in the Infinity class for SunStone Ships, the proven ULSTEIN CX103 platform continues to demonstrate its strength. Built at the CMHI shipyard and chartered to Aurora Expeditions, the vessel is now ready to explore polar regions, remote coastlines, and global destinations.
5 September 2025 – Bernhard Schulte Offshore (BS Offshore) has taken delivery of its latest state-of-the-art Commissioning Service Operation Vessel (CSOV), WINDEA Clausius, yard number 321, from Ulstein Verft.
The Norwegian government has announced its decision to purchase British frigates. Ulstein has collaborated with the Germany-based TKMS in an effort to secure the contracts.
Yinson GreenTech’s business unit marinEV, which delivers maritime electrification solutions in Singapore, has entered into a partnership with Blue Ctrl AS, a Norwegian software provider specialising in maritime systems. The collaboration will introduce Blue Ctrl’s X-CONNECT platform to the maritime market in Singapore.
On Friday 15 August 2025, the hull for a new offshore wind service vessel of the CSOV type arrived at Ulstein Verft. This marks a new step in the process towards the completion of this state-of-the-art vessel, which has been developed to support energy-efficient offshore wind operations with high performance.
Ulstein Verft has signed a contract with Olympic to retrofit the Olympic Notos for operations supporting unmanned installations on the Norwegian Continental Shelf. This project will provide extensive work for Ulstein.
Van Oord and Ulstein collaborate on a powerful newbuild set to enhance offshore installation capabilities.
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Ulstein Design & Solutions AS
Ulstein Design & Solutions B.V.
Ulstein Verft AS