The hull of the first TWIN X-STERN Commissioning Service Operation Vessel (CSOV) for BS Offshore arrived at Ulstein Verft on 18 December 2024 at the start of the outfitting for Yard Number 320 at Ulstein Verft.
Ulstein Verft welcomes BS Offshore back to the shipyard for their first ULSTEIN SX222 CSOV. This hull arrival is significant in constructing a state-of-the-art vessel designed to support the growing offshore wind industry.
The SX222 design is known for its superior operational performance and seakeeping abilities, ensuring the vessel meets high efficiency and safety standards.
The vessel was positioned in the dock hall, where it will be secured and lighting installed. It will then undergo comprehensive outfitting, including the installation of electrical and mechanical systems, piping, accommodation, and system integration.
The hull was constructed at the Crist yard in Poland, with various Ulstein companies, including Ulstein Design & Solutions AS, Ulstein Poland, and Ulstein Verft, handling all design and engineering tasks.
The first vessel based on this design was delivered in summer 2024 and has shown record-low fuel consumption during dynamic positioning. BS Offshore will receive a vessel representing the latest maritime innovations, playing a crucial role in supporting offshore wind operations.
The SX222 CSOV is equipped with advanced technology, including a 3D-compensated crane and a Walk-to-Work gangway, ensuring safe and efficient personnel and cargo transfer to offshore wind turbine facilities. The vessel also features a diesel-electric propulsion system with substantial battery energy storage, significantly reducing its environmental footprint, and is prepared for methanol as fuel.
The hull’s arrival is a key step towards the vessel’s completion, with final outfitting, commissioning, and testing to follow. The vessel is expected to be delivered in summer 2025, ready to support the offshore wind sector with modern, high-comfort accommodation for up to 132 crew and clients.
BS Offshore has previously built three offshore wind service vessels at Ulstein Verft. Yno 320 and the sister vessel, Yno 321, will be their first with the TWIN X-STERN.
