Subsea vessel Island Performer, design SX121, photo Marius Beck Dahle


Our subsea portfolio includes flexible designs for Offshore Construction, Well Intervention, Inspection/Maintenance/Repair (IMR), Subsea Umbilicals, Risers and Flowlines (SURF) and rock installation vessels.

Vessel designs for subsea operations

Our design solutions have features to meet the operational demand set for your specific operations. The designs give you high flexibility to configure features such as ROV hangars, offshore cranes, module handling towers and other relevant equipment solutions.

Our designs give high functionality, large work deck and equipment-carrying capability and good seakeeping abilities to ensure high operability under harsh weather conditions, high transit speed and low fuel consumption.

Segments SUBSEA 2015 cranecap2

Subsea portfolio

S182 sea
Length: 115.4m
Beam: 30.8m

Proven designs - see our references

Vessel designs for the energy market

Our vessels are designed to operate in the Offshore Energy market (wind, oil and gas), making them a versatile option for companies looking to invest in sustainable energy solutions.

The SX120 design, the Oceanic Vega, met the tropical hurricane 'Igor' on her way across the Atlantic.

Survey and inspections

As a renowned ship designer, we offer innovative survey and inspection vessels. Our designs prioritize efficiency, safety, and advanced technology, ensuring seamless operations. 

You can trust us to enhance your surveying capabilities and your business' success.

The Fortitude is designed for ultra deepwater installation and construction, pipelay and heavy lift support. Photo: Flying Focus.

Construction and installation

We understand the unique challenges of the offshore energy segment. That's why we provide comprehensive support throughout the entire process, from initial design to construction and delivery. 

Our knowledgeable team is always available to offer expert guidance and assistance, ensuring a smooth and successful project.

Acta Auriga offshore wind farm

Operations and maintenance

We have a deep appreciation for the distinctive obstacles faced by the offshore energy sector. This understanding drives us to offer extensive support at every stage, from the initial design phase to construction and delivery. 

Our highly competent team remains readily accessible to provide expert guidance and assistance, guaranteeing a seamless and prosperous project experience.


Ulstein Design & Solutions AS


Ulstein Design & Solutions B.V.