Bathymetry is the science of measuring the depths and relief of the ocean to determine the topography of the sea floor. This technique maps the depth of water columns. A complete bathymetry system combines a water column measuring instrument (echo probe) and a positioning instrument (DGPS or RTK). Géosig, through its partner Géophysique GPR, is able to meet all your bathymetry requirements since we have systems ranging from single-beam bathymeters to multibeam devices and state-of-the-art helicopter-borne ground penetrating radar. Bathymetric sounders work like sonars, emitting sound vibrations, detecting their echo after bounce off the bottom and determining travel time. The information thus provides a horizontal or two-dimensional profile. Applications of bathymetry: Hydrographic surveys for boating safety; Production of digital models of the seabed for engineering design (tunnel layout, pipeline, bridge); Dredging control; Hydroelectric projects; Geotechnical and engineering studies. A convention using color codes makes it possible to map the seabed in a standardized way (General Bathymetric Chart of the Oceans or GEBCO, established under the aegis of the Intergovernmental Oceanographic Commission and the International Hydrographic Organization).