The hull of Ulstein’s yard no 321 for BS Offshore has arrived at Ulstein Verft in Norway from the Crist shipyard in Poland, for completion of securing, painting, outfitting, piping, equipment installations, electrical work, and system integration.
The vessel has been designed by Ulstein Design & Solutions for ‘walk-to-work’ (W2W) operations, where personnel travel via a motion-compensated gangway from the ship to a wind turbine. The vessel is sister to Yno 320, launched at Ulstein Verft in February 2025.
The hull construction at Crist was closely monitored by a site team from Ulstein Verft, while the designers and engineers at the various Ulstein companies in Norway and Poland finalised the detailed drawings for the ship.
Matthias Müller, BS Offshore MD said: “We are pleased to see the journey toward completing the second CSOV is progressing and look forward to the continued progress and collaboration in bringing this vessel, designed with efficiency, safety, and sustainability at its core, to life.”
Like its predecessor, the newbuild is part of the innovative Twin X-Stern CSOV series, designed for optimised operational performance and seakeeping abilities. During the outfitting phase, the vessel will be equipped with technology including a 3D-compensated crane and a gangway, ensuring safe and efficient personnel and cargo transfer to offshore wind turbine facilities.
The vessel will have a diesel-electric propulsion system incorporating substantial battery energy storage, significantly reducing the environmental footprint, while the engines are prepared for methanol as a future fuel. After delivery later in 2025, the vessel will be ready to support the offshore wind sector with modern, high-comfort accommodation for up to 132 crew and clients.
This is Ulstein’s fifth W2W vessel for BS Offshore. All have been designed by Ulstein Design & Solutions and constructed at Ulstein Verft.
Image: Bare hull for BW Offshore’s second W2W vessel arrives at Ulstein Verft (credit: Ulstein Group)
