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 sometimes be used to identify submarines near the surface. Another method involves the use of satellites equipped with sensors that can detect heat or other signatures from submarines. Additionally, drones and unmanned underwater vehicles (UUVs) are increasingly being used to enhance detection capabilities, providing real-time data and improving surveillance efforts.