Multibeam sonar is a technology used to map the seafloor and underwater features. It works by emitting multiple sound waves simultaneously, which bounce off the ocean floor and return to the sonar system. This allows for the collection of detailed information about the underwater landscape, including depth and shape. The data gathered by multibeam sonar is crucial for various applications, such as marine research, navigation, and underwater construction. It helps scientists and engineers understand the ocean environment better and supports activities like fishing and environmental monitoring.