Heerema Marine Contractors has completed the offshore foundation installation campaign for the Bałtyk 2 and Bałtyk 3 offshore wind farms in the Baltic Sea. The project involved the installation of 100 wind turbines and two offshore substations over a four-month offshore campaign.
The offshore contractor completed the work well within the project schedule. The project was executed for the Equinor-Polenergia joint venture. Baltyk is one of Poland’s largest offshore wind projects.
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Thialf and 35 support vessels
Using its semi-submersible crane vessel Thialf, and a fleet of approximately 35 support vessels, Heerema safely installed 100 monopiles, 100 transition pieces and two offshore substation jackets. The campaign combined large-scale offshore operations with a complex logistics programme involving multiple fabrication yards, ports, marine contractors and offshore work fronts.
The successful execution of the campaign relied on close cooperation between Heerema, vessel owners, subcontractors, marine service providers, fabricators and project teams onshore and offshore. Managing the continuous flow of foundations, installation vessels, crews and equipment required detailed planning and coordination throughout the installation season.
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Heerema managed fifteen vessels at once
At peak activity, Heerema managed and operated approximately fifteen vessels simultaneously across the project area, supporting transportation, marine coordination, noise mitigation, crew transfer, grouting, bolting and other critical offshore activities. This integrated approach enabled the company to maintain a highly efficient installation sequence while upholding the highest standards of safety and operational performance.
Equinor and Polenergia are developing the Bałtyk 2 and Bałtyk 3 offshore wind farms, which will play an important role in expanding Poland’s renewable energy capacity. The completion of the foundation installation campaign marks a significant step forward for the project. The Dutch offshore contractor will return to the Baltic Sea this winter to install the Bałtyk 2 Offshore Substation, followed by the Bałtyk 3 Offshore Substation in summer 2027.
Picture: Thialf installs monopiles and transition pieces at Baltyk 2 and 3 (photo Heerema).
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