Underwater sensors are devices designed to collect data from beneath the water's surface. They can measure various parameters such as temperature, pressure, salinity, and water quality. These sensors are commonly used in marine research, environmental monitoring, and underwater exploration. These sensors can be deployed on buoys, submarines, or autonomous underwater vehicles (AUVs). They help scientists and researchers understand ocean conditions, track marine life, and monitor changes in ecosystems. By providing real-time data, underwater sensors play a crucial role in managing and protecting aquatic environments.