The periscope and electronic monitors help the crew see what's around (and above) them in the water. The diving plane controls the ship's buoyancy and helps the ship get underwater. Sonar detects mines, fishing lines, and other hazards to the ship. Torpedo launch tubes are used to launch weapons against enemies. Batteries make up 25% of the overall weight of a submarine and provide power support and ballast. Modern subs have a nuclear reactor that turns the turbine that drives the propeller to spin. The engine compartment is where the ship's power supply is. The propeller spins to push the ship through the water. They also power life support functions and let the ship attack enemies. Submarines are made up of a variety of parts that help the ship move on the surface and under the water. Submarine Escape and Rescue: A Brief History.Today, submarines still play an important role in strategic planning for militaries around the world. Unlike earlier submarines, nuclear-powered subs were able to stay underwater for much longer and could launch nuclear missiles from underneath the water's surface. During the 1960s, the nuclear-powered submarine played an important role in the Cold War. Submarines played an even larger role during World War II and were used by both the Axis and Allied powers in the Atlantic and Pacific oceans. Although submarines were first used during the Civil War in the 1860s, it wasn't until World War I that they became an import tool in warfare, when Germany used submarines to attack merchant ships on the surface of the Atlantic Ocean. Submarines have a completely different design from other ships due to this ability. A submarine is a vessel that can move on the water's surface and independently propel itself under the water as well.
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