Underwater systems refer to various technologies and structures designed to operate beneath the surface of water. These systems can include underwater vehicles, sensors, and communication devices that help in exploration, research, and monitoring of aquatic environments. They are essential for studying marine life, underwater geology, and for conducting search and rescue operations. Additionally, underwater systems play a crucial role in industries such as oil and gas, marine biology, and oceanography. They enable scientists and engineers to gather data and perform tasks in challenging underwater conditions. Examples include remotely operated vehicles (ROVs) and autonomous underwater vehicles (AUVs) that can navigate and collect information from deep-sea locations.