Global ocean services provider DeepOcean has successfully completed the installation and testing of all inter-array cables at the Nordseecluster A offshore wind farm in Germany, marking a significant milestone for what will become a 660 MW facility when fully commissioned.

Campaign Scope and Timeline

Cable-laying operations at Nordseecluster A commenced in January 2026, with a total of 48 inter-array cables installed between January and April under what DeepOcean described as some of the more challenging offshore weather conditions. Termination and testing activities have since been completed, with the project announced as fully concluded on 24 June 2026.

DeepOcean's scope of work was extensive, covering project management and engineering, the provision of cable protection systems, offshore preparatory works including burial assessments, pre-installation cable route surveys, foundation and offshore substation preparatory works, transport and installation of the inter-array cables including cable pull-in, and cable burial activities including seabed surveys and monitoring.

The project was managed out of DeepOcean's Aberdeen office in the United Kingdom, with additional support from the company's Norwegian offices in Haugesund and Oslo.

Fleet Mobilization and Vessel Roles

DeepOcean mobilized a fleet of four vessels to execute the installation campaign, including two chartered vessels and two walk-to-work vessels providing crew support. Seabed survey services were carried out by a fifth vessel from DeepOcean's fleet.

Cable-laying operations were conducted from the Olympic Ares, a multi-role subsea construction vessel that was modified specifically for the project with the addition of a carousel and lay spread.

DeepOcean noted that this flexible lay spread can be rapidly deployed and installed on other vessels within its fleet, indicating the equipment's wider operational utility beyond this single project.

Subsea trenching and burial operations were carried out from the M/S Volantis, a subsea construction vessel that utilized DeepOcean's UT-1 jet trenching system.

The UT-1 is described as a versatile 2,800-horsepower trencher capable of conducting subsea trenching for cables and pipelines up to 46 inches in diameter. It can trench installations to depths exceeding three metres and operate in water depths of up to 2,500 metres.

Scale of the Operation

The installation campaign involved more than 200 people engaged across DeepOcean and its partners. DeepOcean Chief Executive Officer Øyvind Mikaelsen highlighted the logistical complexity of coordinating such a workforce across four vessels while maintaining schedule adherence and safety standards.

"We are proud to have successfully managed and coordinated such an extensive installation campaign, involving four vessels and more than 200 people engaged between DeepOcean and its partners, with the schedule optimized in a robust and safe manner. We thank RWE for entrusting us with this responsibility," Mikaelsen said.

Mitchell Pike, Executive Vice President for DeepOcean's offshore renewables division, pointed to the project as evidence of the company's broader turnkey capability in the market.

"The project operations were executed to consistently high standards, demonstrating the unique offering we bring to the industry. Our adaptable cable-laying and trenching vessels, backed by a dedicated and experienced team, deliver turnkey transport and installation solutions in a cost-effective way for our clients," Pike said.

About the Nordseecluster A Wind Farm

Nordseecluster A represents the first phase of the wider 1.6 gigawatt Nordseecluster project. Once fully commissioned, which is expected to occur in early 2027, the wind farm will comprise 44 Vestas V236-15.0 MW wind turbines and deliver a total installed capacity of 660 MW.

The wind farm is owned by RWE together with Norges Bank Investment Management, the investment management arm of Norway's central bank.

About DeepOcean

DeepOcean is owned by Triton, a European mid-market sector-specialist investor. The company offers survey, engineering, project management, installation, maintenance, and recycling services across the oil and gas, offshore renewables, deep sea minerals, and broader ocean services sectors.

The company describes its operational focus as centered on remote and unmanned operations and digitally-enabled services, with an emphasis on lowering its carbon footprint across its activities.

Triton, which was founded in 1997, invests in businesses operating across the Business Services, Industrial Tech, and Healthcare sectors, and describes itself as an active owner that works closely with portfolio companies, including DeepOcean, to drive value creation.

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