Submarine technology refers to the design and engineering of underwater vessels that can operate beneath the surface of the water. These vessels, known as submarines, are equipped with advanced systems for navigation, communication, and propulsion. They can be used for various purposes, including military operations, scientific research, and underwater exploration. Modern submarines utilize technologies such as sonar for detecting objects underwater and nuclear power for extended missions without surfacing. They are built to withstand high pressure and can remain submerged for long periods, making them essential for strategic defense and exploration of the ocean depths.