Since erosion and submersion phenomena have a major effect on the sustainable management of activities on the coast of Corsica, it is necessary to complete the important information gathered by a global view of the phenomena at the level of the coastal area of Corsica. The acquisition of this laser data by airplane flying at low altitudes will also provide unprecedented land-sea information enabling the more than 15 years of ROL’s work to be valued by an integrated interpretation of phenomena up to a depth of 30 m at sea. The acquisition of data on this maritime component of the Litto3D® altimeter repository will improve knowledge of coastal hazards and coastal erosion. Currently, the lack of precision of bathymetric data is identified as a brake on the precise characterisation of marine hazard on several areas with issues identified on the Corsican coastline. Furthermore, to accelerate the coverage of French coastal areas with LIDAR Bathymetric data, the Ministry of the Environment has committed to fund for 5 years, via the Shom, the Major Natural Risk Prevention Fund (FPRNM). The combination of the resources involved allows Corsica to acquire a basis for the implementation of its risk prevention strategies and plans throughout Corsica. The project represents approximately 3 050 km².