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Hydrographic survey is the scientific process of measuring and describing physical features of oceans, seas, rivers, lakes, and coastal areas. It focuses on mapping water depths, tides, currents, and the shape of the seabed. The primary aim is to produce nautical charts that ensure safe navigation for ships and boats. Hydrography is often described as the aquatic counterpart of topography, but instead of land elevations, it deals with underwater terrain. These surveys are conducted using specialized equipment such as echo sounders, sonar systems, and satellite-derived technologies. By providing accurate data, hydrographic surveys support maritime safety, infrastructure development, environmental monitoring, and resource exploration. As global trade and coastal development expand, hydrography has become indispensable for managing aquatic environments responsibly and efficiently, ensuring both economic growth and ecological sustainability.