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First job for the offshore wind industry comprising transport & installation of the offshore substation (OSS) for the Saint-Nazaire offshore wind farm in the Bay of Biscay.
Company : DEME Offshore (Parc du Banc de Guérande)
Location : Loire Atlantique, Bay of Biscay
25 m
Max water depth
Scope of work
- Engineering of installation plans & rigging
- Installation of offshore substation (OSS) jacket & topsides
- ROV survey work before and during installation
- Levelling & grouting works
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Specials & challenges
- Allseas’ first installation job for the offshore wind industry
- First OSS installation in French waters
- Jacket & topsides lifts from third-party barge in the field
- Shallow water requiring Pioneering Spirit to operate at minimum draught
- Difficult sea conditions (shallow water, strong swells & currents)
- Large number of stakeholders
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