Diesel-electric submarines are a type of submarine that use a combination of diesel engines and electric batteries for propulsion. When on the surface, the diesel engines generate power and recharge the batteries. When submerged, the submarine relies on the stored electric power, allowing it to operate quietly and stealthily underwater. These submarines are known for their versatility and are often used by various navies around the world. They can perform a range of missions, including surveillance, reconnaissance, and anti-submarine warfare. Notable examples include the German Type 212 and the U.S. Navy's {Virginia-class} submarines.