Member News: MacArtney secures contract to deliver mission equipment package for N-Sea’s cable lay and repair vessel Altera

June 20, 2025
Member News: MacArtney secures contract to deliver mission equipment package for N-Sea’s cable lay and repair vessel Altera

MacArtney Offshore Wind Solutions, in collaboration with Subsea Cable Assets (SCA) and Enersea, has been awarded the contract to design and deliver a fully integrated cable lay spread, a tailored solution for N-Sea’s new cable-laying vessel, Altera.

This project demonstrates the value of trusted partnerships, combining MacArtney’s advanced mission equipment and control systems, SCA’s fabrication and EPCI expertise, and Enersea’s intelligent deck layout and integration design.

The result is a turnkey system designed to enhance operational efficiency, ensure safety, and enable swift mobilisation, customised to meet the demands of modern offshore wind cable installation and repairs.

Enabling performance through integration
The integrated cable lay spread includes a 4,500t carousel, an automated loading tower with integrated tensioner, a 15t tracked deck tensioner, a quadrant and quadrant handling system with sliding banks, cable highways, retractable stern chutes, and a range of winches.

The system is delivered as a complete package, from concept and layout to hardware and execution, backed by a streamlined mobilisation philosophy designed to avoid disrupting Altera’s construction process.

“We’re really proud of this collaboration,” says Mike Welling, Business Development Manager at MacArtney Offshore Wind Solutions. “It’s a great example of how aligned partnerships can deliver true value to the offshore wind sector.”

All components are engineered for seamless integration, supporting safe, flexible, and efficient offshore operations. Delivery and mobilisation onboard the Altera are planned for Q1 2026.

Looking ahead
As the offshore wind sector continues to scale, collaboration and integration remain key to delivering efficient, future-ready solutions.

“By joining forces with SCA and Enersea, we’ve brought together the best of three worlds — innovative technology, smart engineering, and robust execution,” Welling adds. “We see this as a strong foundation for future opportunities and look forward to continuing this journey together.”

This project reinforces MacArtney’s role in enabling the offshore wind industry through reliable, integrated cable lay solutions that keep offshore wind moving forward.

 

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AREG has played an important role in the growth of Scotland’s renewable energy sector, engaging the supply chain and developing the European Offshore Wind Deployment Centre. However, we are only at the very beginning of the transition that AREG was established to both lead and support so there are still opportunities for companies to get into the constantly evolving renewables supply chain. We look forward to continuing our work together as renewables builds on its place as Scotland’s main source of power, and as we seek to deliver real change in the crucial areas of heat and transport.

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Aberdeen & Grampian Chamber of Commerce has worked closely with AREG since its formation. The recent progress in the developments of offshore wind projects by Equinor and Vattenfall are as a result of the work of the group over many years. The north-east is known as the oil and gas capital of Europe. At the Chamber, we believe the region must evolve its position to being recognised as the energy capital. Whilst hydrocarbons will continue to be essential in driving our economy for years to come, the generation of renewable resources will play an increasingly important role in providing cost-effective power, innovative development and economic growth.

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