Acta Marine has ordered the two first Ulstein Twin X-Stern™ Construction Service Operation Vessels (CSOVs) with design from Ulstein Design & Solutions AS.

The design contract also includes options for two vessels, all four of the SX216 design by Ulstein. The vessels will be delivered with dual-fuel methanol/diesel power generators.

“We are pleased to build on our existing relationship with Ulstein Design & Solutions AS for our next generation CSOV vessels combining Acta Marine’s operational experience and Ulstein’s innovative design capabilities,” states Rob Boer at Acta Marine.

The Ulstein Twin X-Stern™ has several characteristics, but the easiest way to describe it is as a ship with two sterns and four main propeller units: two at each end.

The proven X-Stern® at each end results in excellent operability with either end towards the weather, without limitation on vessel speed.

The Twin-X-Stern designs from Ulstein share the characteristics of improved fuel efficiency, increased dynamic positioning (DP) capability and manoeuvrability, reduced motions and reduced noise. The Twin-X-Stern offers larger flexibility regarding the choice of propeller type, a bi-symmetric hull shape and propulsion setup with fewer propulsion units is possible.

Quality rest is needed for the technicians to perform safe operations. Ulstein’s designs provide secure access for the service personnel to offshore wind installations and ensure safe operations and comfortable accommodation for the onboard personnel.

The CSOVs for Acta Marine have a hybrid power solution, with green methanol intended as the main source of energy.

The Dual-Fuel engines are supported by a battery package, integrated into the vessel in such a way as to allow the most fuel-efficient modes of operation, reduced maintenance costs and reduced emissions.


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