Photo taken by Flying Focus, no sharing outside of Ulstein. CSOV Acta Pegasus is one of four TWIN X-STERN, Ulstein designed vessels built at Tersan, Türkiye, for Acta Marine, delivered in 2026.

Acta Pegasus

A Construction Service Operation Vessel (CSOV) for the Offshore Wind Industry. Often described as the four‑wheel drive of the sea, a TWIN X‑STERN® vessel combines a bi‑symmetric hull with propulsion at both ends to deliver superior control and efficiency in either direction.

Ordered By
Acta Marine
Owned By
Acta Marine
Built By
Partner yard
Year
2025
IMO Number
Operated By
Acta Marine

Primary specifications as built

Length
89.9 m
Beam
19.2 m
Dead weight
2,200 tonnes
Draught (max)
5.9 m
Speed (max)
12.8 kn
Accommodation
135 POB

Additional Data

Deck area, in warehouse
550 sqm
Deck area, on cargo deck
440 sqm
Fuel oil
450 sqm
Methanol
380 sqm
Ballast water
1,500 sqm
Fresh water
340 sqm
CTV fuel
65 sqm
Note: Specifications may have changed since the original completion date.
Classifications: 1A✠, SF, E0, OffshoreServiceVessel, Strengthened(DK, HA), DYNPOS(AUTR), NAUT(OC), LFLFuelled, Clean(Design), BWM(T), COMF-V(2), COMF-C(2), BIS, Recyclable, Battery(Power), ER(SCR, Tier III), SPS, Walk2Work

Ship history

Acta Marine was the first shipowner to contract vessels based on the highly optimised hull form ULSTEIN TWIN X-STERN, which offers unmatched workability in field and adverse weather conditions. The Acta Pegasus and three sister vessels have been constructed at the Tersan shipyard. 

  • Safe and step-less people transfer by 3D motion compensated gangway up to Hs 3.0 metres with excellent winter workability
  • 6t 3D motion-compensated knuckle boom crane for efficient cargo handling
  • State-of-the-art hotel facilities to accommodate 135 persons and ample deck space for cargo storage (940 m2)

Acta Pegasus sails under the French flag.

Milestones

Contract signed: June 2022

Best Industrial Design Company Award: October 2022

Steel cutting: January 2023

Project update all four vessels: January 2025

Delivery: December 2025

Get in touch

Runar Muren DSC4429 comp bw

Runar Muren

Description
Managing Director
Affiliation
Ulstein Design & Solutions AS