How is bathymetry defined?

Bathymetry is specifically defined as the study and measurement of underwater depth of water bodies such as oceans, seas, lakes, and rivers. This involves determining the underwater topography and mapping the floor of water bodies, which is crucial for navigation, marine construction, resource management, and environmental studies. Understanding bathymetry allows for the assessment of habitat structures, sediment types, and can influence tidal currents and wave patterns.

The correct answer highlights the primary focus of bathymetric surveys, which is to accurately measure and chart depths, thereby providing essential information for various applications. It is a fundamental aspect of hydrographic surveying, essential for safe navigation and the management of aquatic resources.