Competitiveness, and therefore cost reduction, are hot topics for offshore wind energy players. In this context, preliminary geotechnical studies are particularly concerned because they are very expensive. They are crucial for the design of wind turbine foundations as they allow the mechanics of the seabed to be characterised. However, this type of study requires campaigns at sea with the deployment of coring machines to take soil samples which are then analysed in the laboratory. It is therefore necessary to develop alternatives to the sole use of geotechnics.