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Acta Pegasus delivered to Acta Marine: Ulstein design supports sustainable offshore wind operations

On 5 January 2026, Acta Pegasus was delivered by Tersan Shipyard to Acta Marine. This vessel is the first of four newbuild Walk-to-Work (W2W) Construction Service Operation Vessels (CSOVs) designed by Ulstein Design & Solutions AS for Acta Marine.

Acta Pegasus is built on the ULSTEIN SX216 platform and features the innovative ULSTEIN TWIN X-STERN hull design. This innovation has become known for its enhanced fuel efficiency, superior dynamic positioning (DP) capabilities, improved manoeuvrability, reduced motion, and lower noise levels. 

The vessel is equipped with advanced offshore access and lifting systems, including a 3D motion-compensated gangway and crane, supporting safe and efficient personnel and cargo transfers.

Acta Pegasus is methanol-ready, featuring dual-fuel engines capable of operating on marine gas oil (MGO) or a blend of MGO and methanol. The vessel also incorporates substantial battery energy storage capacity, further optimising fuel efficiency and reducing emissions. These environmentally friendly technologies are designed to support the transition toward lower-emission offshore operations, reflecting Acta Marine’s commitment to sustainable solutions. The vessel will support offshore wind projects in France and contribute to renewable energy growth in the region.

Acta Pegasus accommodates up to 135 people in high-comfort cabins and offers a range of amenities to ensure crew well-being, including a modern restaurant, multifunctional lounges, a sauna, a gym, and smart Wi-Fi connectivity. 

The delivery of Acta Pegasus marks a significant step in Acta Marine’s ongoing investment in a modern, sustainable, and future-ready fleet. Sister vessels Acta Hercules, Acta Gemini, and Acta Aquarius are scheduled to join the fleet throughout 2026, further strengthening Acta Marine’s capacity to provide reliable and efficient offshore support services.

Ulstein’s W2W designs

Walk-to-work (W2W) operations involve a heave-compensated gangway from the vessel connecting to an offshore installation for the safe transfer of personnel. 

Ulstein’s W2W ship designs are designed to support the effective commissioning, operation, and maintenance of offshore installations. 

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Rolf Petter Almli

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Sales Manager
Affiliation
Ulstein Design & Solutions AS

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Ulstein designs for the standardised naval auxiliary vessels

With over a century of shipbuilding heritage, Ulstein is a vital part of the Norwegian maritime cluster, synonymous with innovation in ship design and the engineering that follows. From offshore vessels navigating the harshest seas to expedition cruise vessels exploring the polar regions, the company has consistently proven its ability to deliver advanced, reliable platforms. 

This experience forms the backbone as Ulstein now develops concepts for standardised naval vessels for the Royal Norwegian Navy. The ships will meet the Navy’s need for advanced, reliable and efficient vessel platforms.

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