Hydrography is the science that studies the physical features of bodies of water, including oceans, rivers, lakes, and other water bodies. It involves mapping and analyzing the underwater terrain, currents, and water quality. Hydrographers use various tools and techniques, such as sonar and satellite imagery, to gather data that is essential for navigation, environmental monitoring, and resource management. The information collected through hydrography is crucial for various applications, including marine navigation, flood management, and environmental protection. Accurate hydrographic data helps in creating nautical charts, which are vital for safe maritime travel, and supports efforts to conserve aquatic ecosystems and manage water resources effectively.