Ulstein Design &amp: Solutions BV, UDS BV, ship design

Vessel delivery in the U.S.: Philly delivers the subsea rock installation vessel Acadia

On 23 June 2026, Hanwha Philly Shipyard delivered the subsea rock installation vessel (SRIV) Acadia to Great Lakes Dredge & Dock. The vessel is the first of its kind under the U.S. flag and is designed by Ulstein Design & Solutions B.V. in the Netherlands.

Published
09 July 2026
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Modern solutions with reduced emissions

Acadia is equipped with energy-efficient systems that reduce environmental impact, including battery packs, shore power connection and the option to operate on biofuel.

GLDD illustration for stand wall Offshore Energy 2021 crop

The vessel has an overall length of 140.5 metres (461 feet), a breadth of 34.1 metres (112 feet), and accommodation for 45 persons.

Built for offshore energy and infrastructure

Acadia is designed to transport and install large volumes of rock on the seabed, securing subsea cables, pipelines and offshore wind foundations. With a capacity of up to 20,000 tonnes, the vessel is built for demanding operations across both oil, gas and renewable energy sectors.

A key feature is its fall pipe system, enabling precise placement of rock on the seabed – essential for protecting offshore infrastructure over time.

The vessel will initially support offshore wind projects off the coast of New York before moving on to operations in Europe.

Get in touch

Edwin van Leeuwen Ulstein 19 comp bw

Edwin van Leeuwen

Description
Managing Director
Affiliation
Ulstein Design & Solutions B.V.
Ulstein 042 bewerkt bw

Marian Rodriguez Suarez

Description
Sales Manager
Affiliation
Ulstein Design & Solutions B.V.

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