A depth charge is an underwater explosive device used primarily by naval forces to target submarines. It is designed to detonate at a specific depth, creating a powerful shockwave that can damage or destroy submerged vessels. Depth charges are typically deployed from ships or aircraft and are an essential part of anti-submarine warfare. The development of depth charges began during World War I, as the need to counter the threat of enemy submarines, like those used by the German Navy, became critical. Over time, advancements in technology have improved their effectiveness, making them a key tool in naval operations throughout the 20th century and beyond.