Bathymetric survey is the process of mapping underwater terrain to determine the depth and topography of seabeds, riverbeds, lakes, and reservoirs. It is essential for marine construction, dredging operations, port development, navigation safety, and environmental monitoring. Using advanced echo-sounding systems (single-beam or multi-beam), GPS, and positioning technologies, bathymetric surveys produce accurate underwater contour maps and 3D models.
Key aspects include: