Submarine detection refers to the methods and technologies used to locate submarines underwater. This is crucial for naval operations and national security, as submarines can be stealthy and difficult to find. Common techniques include sonar, which uses sound waves to detect objects, and radar, which can identify surface vessels associated with submarines. Another method involves the use of satellites and aerial surveillance to monitor ocean activity. Advanced technologies, such as acoustic sensors and magnetic anomaly detection, help improve detection capabilities. These systems work together to provide a comprehensive approach to identifying and tracking submarines in various environments.