active sonar

Active sonar is a technique used to detect underwater objects, such as submarines or schools of fish, by emitting sound waves and listening for their echoes. It works like a bat's echolocation; a sonar system sends out a pulse of sound, which travels through water, hits an object, and bounces back. By analyzing the time it takes for the echoes to return, the system can determine the object's distance, size, and shape. Active sonar is commonly used in naval operations, fishing, and underwater exploration, providing crucial information about the underwater environment.