Service hydrographique et océanique de la marine (SHOM)

The Service hydrographique et océanique de la marine (SHOM) carried out offshore site-investigation work to support early-stage knowledge building for the Oléron 1 offshore wind farm area (AO7) on the Sud-Atlantique façade, located off Île d’Oléron. The project timeline lists an in-situ measurement campaign led by SHOM from March to July 2022 and again from September to October 2022, aimed at improving understanding of local bathymetry and the nature of the seabed across the planned development zone. In addition to these in-situ seabed and bathymetric surveys (geophysical scope), the project documentation referenced on the page includes multiple SHOM deliverables that extend into seabed characterisation and sampling. These include an initial sedimentology synthesis (2022) and a report analysing morpho-sedimentary surveys (2023), indicating SHOM contributed to sediment mapping and the collection/analysis of seabed samples that inform ground conditions. The same project study library also lists SHOM materials described as environmental reconnaissance and baseline knowledge products (including oceanographic and hydrographic syntheses). Together, these activities positioned SHOM as a key provider of geophysical survey, seabed sampling/ground-truthing inputs, and associated environmental reconnaissance outputs for the Oléron 1 study area during the development phase.