Tersan Shipyard has successfully launched the third and fourth Offshore Wind Farm Support vessels for Acta Marine, which will soon be named Acta Gemini and Acta Aquarius, respectively. Following the launch of the first two vessels; NB1120 and NB1121 in July 2024, all four vessels are now at sea, progressing through the outfitting phase. These ships, designed by Ulstein Design & Solutions AS in collaboration with Acta Marine, are tailored to meet the evolving demands of the offshore wind market. Their advanced features, including the TWIN-X stern architecture, an integrated walk-to-work gangway system, a 3D motion-compensated crane, and hotel-style accommodations, ensure high performance in personnel and cargo transfer operations.
Each vessel measures 89 meters in length and 19 meters in beam. The first two vessels, NB1120 and NB1121, are designed to accommodate up to 88 personnel, while the third and fourth vessels offer an expanded capacity of 135 personnel housed in 85 cabins. The ships are equipped with a Motion Compensated Gangway system called “Walk to Work” and supplied by SMST, mounted on integrated towers with height adjustment and a personnel/cargo lift, enhancing safe access to offshore wind farms. In addition to this, they feature a 3D-motion compensated crane with a 6-ton lifting capacity, also supplied by SMST, along with expansive cargo areas comprising 500 square meters of indoor storage and 500 square meters of outdoor space. These vessels are built to operate efficiently even in harsh offshore conditions, capable of conducting safe transfers with wave heights of up to 3.00 meters.
Designed for exceptional maneuverability, operability, and workability, the vessels optimize onboard logistics to maximize efficiency while ensuring high productivity and superior comfort for the crew. Their dual-fuel methanol propulsion system provides a significant reduction in CO₂ emissions, aligning with sustainability efforts in offshore operations. The first two vessels are scheduled for delivery in the third quarter of 2025, while the remaining two are expected to be completed by the end of the year.
