Tersan Shipyard has delivered NB1123 Acta Aquarius, the fourth and final vessel in its series of Walk-to-Work (W2W), DP2 Construction Service Operation Vessels (CSOVs) built for Acta Marine. The sale has been formalised and the vessel will leave the shipyard in about a week to begin operations. Acta Aquarius has successfully completed methanol sea trials and fulfilled all related class requirements, enabling her to operate on methanol from delivery. This achievement marks an important milestone for Tersan and Acta Marine, supporting the offshore wind sector’s transition to lower-carbon operations.
Designed by Ulstein Ship Design, Acta Aquarius is a 88-metre-long, purpose-built Walk-to-Work (W2W) Construction Service Operation Vessel (CSOV), developed to support the construction and maintenance of offshore wind farms. Classed DP2, she is able to hold position with high reliability and redundancy during close-proximity operations at offshore wind turbines. The vessel is equipped with an advanced motion-compensated SMST Walk-to-Work gangway, enabling safe and efficient transfer of technicians to offshore installations. A daughter craft further extends her operational flexibility. Acta Aquarius offers accommodation for up to 135 personnel, with hotel-standard cabins and comfortable communal spaces designed to give offshore crews a true home away from home
With Acta Pegasus, Acta Hercules and Acta Gemini already in service, the delivery of Acta Aquarius completes the four-vessel programme. The series reflects Tersan’s role in modernising the global offshore energy fleet and its growing experience in complex, technology-intensive vessels.
