The Ulstein designed GLDD subsea rock installation vessel for US offshore wind.

Rock installation: Awarded ship design contract for U.S. Offshore Wind Industry

Great Lakes Dredge & Dock contracted Ulstein Design & Solutions BV to design the first U.S. flagged Jones Act compliant, inclined fallpipe vessel for subsea rock installation. The vessel is critical in building the future of the U.S. offshore wind industry, including establishing a U.S. based rock supply chain network.
Published
14 December 2020
Share
  • The rock installation vessel will be installing protective layers of rock at offshore wind turbine foundations by means of an inclined fall pipe system.

Les på norsk

"We are extremely proud that Great Lakes Dredge & Dock Co. LLC (GLDD) has entrusted us to develop their new asset", says Edwin van Leeuwen, managing director at Ulstein's Dutch design office.

"We much enjoyed the cooperation with the GLDD team in developing the concept over the last couple of months, even though we never met physically due to the COVID-19 travel restrictions. Our team is eager to continue the further development of the vessel with GLDD."

The vessel will primarily serve the growing needs in US offshore wind, installing protective layers of rock at offshore wind turbine foundations by means of an inclined fall pipe system. Furthermore, its large and strong aft deck area makes the vessel a highly flexible asset to GLDD enabling specialised subsea operations.

Blended design method

"At the start of the design we applied our newly developed 'Blended Design' method, enabling GLDD to co-evolve their business case with the ship concept. This resulted in significant gains in economic performance, at the same time reducing fuel consumption and emissions, by optimising vessel main dimensions, speed and dynamic positioning capability". mentions Ko Stroo, Ulstein's lead naval architect and project manager. "Our design for this US Coast Guard compliant vessel strongly focused on Jones Act compliant shipbuilding in the USA and ease of construction."

The Basic Design will be developed by Ulstein's Dutch design office, with strong engineering contributions from its sister offices in Norway and Poland.

Ulstein Design & Solutions B.V. specialises in the design and development of game changing ships for the offshore energy market. Sometimes brilliantly simple, sometimes necessary complex. We push for sustainable solutions. Besides newbuild designs, Ulstein Design & Solutions is actively involved in consultancy and feasibility studies for upgrading vessels.

Latest news

X CONNECT GUI PMS
Press Release

Introducing ULSTEIN® POWER VSG: Setting new standards in marine power efficiency

The ULSTEIN® POWER Variable Speed Generator (VSG) has been designed to optimise power generation on marine vessels by dynamically adjusting its speed to match load requirements. Together with technical measures and overall ship design, the operational results on the CSOV Olympic Boreas show a record-low 2.7-tonne fuel consumption per 24 hours during a week of DP operations. 

A birds view on Olympic Notos 20241005 Olympic Notos OCLIN 19 MARTIN GISKEGJERDE
Feature

Big fuel savings on first CSOV newbuilds with Ulstein’s TWIN X-STERN® concept

Taking bold commercial risks on novel vessel concepts with a strong focus on sustainability has made Olympic a pioneering player in the offshore energy sector. Its latest investment in a pair of new-build Construction Service Operation Vessels (CSOVs) based on Ulstein Group’s innovative TWIN X-STERN® solution has paid off, with close to 50% reductions in fuel consumption and emissions to boost environmental performance.

20241005 Olympic Notos OCLIN 11 MARTIN GISKEGJERDE
Press Release

Ulstein delivers CSOV vessel Olympic Notos to Olympic

13 November 2024: Ulstein is proud to announce the successful delivery of the Construction Service Operation Vessel (CSOV) Olympic Notos to Olympic. This state-of-the-art vessel marks a significant milestone in maritime innovation and excellence. “As a result of the findings from her sister ship, Olympic Boreas, the shipping company states that the vessels "operate with close to a 50% reduction in fuel consumption compared to other sailing CSOVs."

Edwin van Leeuwen Ulstein 19 comp bw

Edwin van Leeuwen

Managing Director

Affiliation
Ulstein Design & Solutions B.V.
Ul

Ulstein Design & Solutions B.V.