The 'Aegir' is based on our SOC 5000 design. Originally a deep water construction vessel, it has been converted by Ulstein to a fast sailing, DP offshore heavy lift vessel.

Heavy Offshore Construction

Designs that move the industry forward

Explore our portfolio of heavy offshore construction vessel design. 

Timas 1201 May 2022

Setting the standard for offshore construction vessels

Heavy Offshore Construction Vessels are the backbone of offshore projects. These versatile vessels are pivotal in pipeline laying, subsea installations, and heavy lifting operations. When it comes to designing and developing these cutting-edge vessels, Ulstein can be perfect partner. With decades of experience, we excel in crafting tailor-made solutions that maximize efficiency, safety, and environmental sustainability. 

As pioneers in offshore vessel design, we remain committed to delivering innovative and reliable vessels that meet the evolving demands of the energy industry.

Marine Automation System based on ULSTEIN X-CONNECT_Ulstein and Eggs

System integration

Cutting-edge solutions that optimise vessel performance and enhance operational efficiency. 

News & featured articles

Turning visions into realities motivates us to keep pushing for progress in the maritime industry. 

You can learn more about how we work with our customers to achieve their visions through our stories. 

In the photo from the left: Dordi Blekken (Ulstein), Mikkel Skou (DNV), Johannes Volle (Ulstein), Barry Authers (DNV)
Press Release

Ulstein Digital joins Veracity by DNV partner network to advance sustainable maritime operations

Ulstein Digital, a newly established subsidiary of Ulstein Group, has officially joined Veracity by DNV’s partner network. The partnership enables seamless integration between Ulstein’s data platform and Veracity by DNV, automatically transferring validated MRV (Monitoring, Reporting, and Verification) data into DNV’s verification service. This automation significantly reduces manual workload, saving time and resources for maritime operators.

2025 Ganway connections
Feature

Mastering walk-to-work operations

The total number of walk-to-work (w2w) vessel designs and redesigns by Ulstein now count 22, of which 14 are currently in operation. In average, these vessels perform repair and maintenance on more than 5,000 turbines – every year! 
That makes a stunning 95,000+ gangway connections!

The heavy lift pipelay vessel, ‘JSD 6000’, is a customised ULSTEIN SOC5000 design. The 215m long DP3 vessel is equipped with a 5,000t revolving main crane and will be cable of performing J-lay and S-lay pipelay work in max water depths of 3,000m.. The combination of heavy lift and S-Lay capabilities together with J-Lay functionality via a large, off-centre moonpool, allows the vessel to serve deepwater and SURF markets as well as shallow-water EPCI projects.  The JSD 6000 vessel is the third cus
Press Release

Totally three Ulstein ship designs win Work Boat World Awards for 2024

Three of Ulstein's designs are among the Work Boat World Awards 2024 winners. Tamhae 3 clinched the 'Best Large Research Vessel' award, Olympic Boreas was named 'Best CSOV', and JSD 6000 took home the 'Best Derrick Layer' accolade from Baird Maritime/Work Boat World. These awards celebrate the best vessels in their categories, judged on design, build quality, and functionality.

PX120 kolage
Feature

Striking the balance

In today's evolving maritime industry, ship owners encounter challenges and opportunities. What options do you have when markets are unpredictable? Sometimes it's all about striking that perfect balance.

Ocean Explorer on sea trial
Feature

Putting the X in eXpedition: The rise of X-BOW ships

"When a viral Drake Passage video surfaced showing huge swells crashing over the bow of Quark Expeditions' Ocean Explorer, it wasn't just the power of the Southern Ocean that made waves. 
The real star? The ship's cutting-edge X-BOW design." 

This quote comes from Alex Loizou at Mundy Adventure. 
With his permission, the whole story continues below. 

Events & conferences

We will be attending many events and conferences, which can be an excellent opportunity to meet. See if we are participating in any upcoming events you are going to. 

Marinetc china
Event
02.12.2025 - 05.12.2025
Shanghai New International Expo Centre, China
Ul

Ulstein Design & Solutions B.V.