Acta Marine has signed a contract for the construction of two methanol MDO/HVO powered DP2 construction service operating vessels (CSOVs) at Turkish shipyard Tersan. The contract includes two optional vessels for delivery at a later stage. The vessels are primarily aimed at the offshore wind construction market.

The vessels are equipped with the new SX-216 Twin-X Stern design from Ulstein Design & Solutions AS that was exclusively designed for and in cooperation with Acta Marine.

‘The dedicated SX-216 design with a Twin-X stern, an integrated walk-to-work gangway system and 3D crane and its hotel style accommodation, represents a next step in responding to the market needs,’ says Rob Boer, managing director at Acta Marine. ‘A first in offshore wind, this vessel will be capable of operating on dual-fuel methanol and MDO/HVO enabling a strong carbon footprint reduction in the near future in combination with a battery power system.’

The CSOV measures 89 metres in length, 19 metres in width and accommodates up to 135 people in 85 cabins. It will be equipped with an SMST-provided motion compensated gangway system, mounted on an integrated tower with height adjustment and a personnel/cargo lift. Additionally, the vessel features an SMST 3D-motion compensated crane with 6-tonne lifting capacity. The cargo area is 500 m2 indoors, and 500 m2 outdoors. The vessel can provide for walk-to-work transfer of personnel and cargo in significant wave-heights (Hs) up to 3.0 metres.

Also read: Acta Marine in the market for new co-owner to grow in offshore wind

Acta Marine opts for methanol

In-field agility, high operability and workability, safe transfer of people and cargo, optimised on-board logistics, high productivity and high comfort for charterers’ crews are of eminent value throughout the design of this vessel. Acta Marine sees methanol as one of the most viable alternatives to minimise its carbon footprint in the marine space and more specifically for offshore vessels.

‘Dual-fuel methanol driven propulsion trains score high in terms of technology readiness and are eligible for further enhancement to a single fuel methanol upgrade at a later stage. This will allow early application of significant CO2 reduction measures now, while still allowing net-zero operations over the life of the ship,’ states Simon Anink, general manager at Acta Marine.

Acta Marine’s new CSOVs can take on assignments in commissioning and construction of offshore wind farms and perform maintenance tasks on completed wind farms. The first two vessels are scheduled for delivery Q2 and Q3 2024.

Acta Marine also operates the walk-to-work vessels Acta Orion, Acta Auriga and Acta Centaurus.

Also read: Acta Marine names third walk-to-work vessel