Orsted has installed a six-legged jacket foundation that will support the offshore substation platform at its 1400MW Hornsea 2 offshore wind farm off England’s Yorkshire coast.
The 4800-tonne jacket was installed by Heerema Marine Contractors heavy lift vessel Sleipnir.
The vessel will also shortly install a jacket to support a reactive compensation platform at the project.
Both foundations and associated pin-piles were produced at Sembcorp Marine facilities in Indonesia and have a total weight of 10,000 tonnes.
They were loaded out of the fabricator’s yard in Batam in mid-August and transported to the UK by heavy transport outfit BigLift.
“We’re delighted to announce that we’ve now officially commenced our offshore construction for Hornsea Two,” said Orsted senior programme director for Hornsea 2 Patrick Harnett.
“Through a remarkable feat of engineering together with our partners, we’ve overcome Covid challenges and are on track for fabricating the world’s largest AC offshore substation, which will be supported by this gigantic steel structure,” he said.
The project’s HVAC substation and reactive compensation platform are still under fabrication at Sembcorp Marine facilities in Asia.
“The ambition and capability of our teams across the world has been remarkable as we continue to overcome obstacles with safe and efficient solutions,” Harnett added.


