When the valve is closed, the ballast tank is filled with air (air is trapped inside), the submarine is lighter than the water surrounding it, and hence it floats (like a ship). Each ballast tank has a hole at the bottom and a valve at the top. The trim tanks are used for keeping the submarine in balance. The ballast tanks help the submarine go down into the sea and come up to the surface. Let us understand how a submarine goes deep into the sea and surfaces back.Ī submarine has main ballast tanks and trim tanks. But if you consider a submarine, its main job is to sink into the depth of the sea and again appear on the surface when required. When we travel in a boat or ship, our main fear is fear of the boat or ship sinking or drowning. In reality, however, the operative depth can be much more. However, a large submarine powered by nuclear energy is known to operate at a depth of 800 feet (250 meters). The depth to which a submarine can dive is normally not published by any country. However, when it comes to submarines, they normally operate unseen. In Germany, it is called U-Boot or under-sea boat, Russia calls it an underwater boat, the USA calls it USS (United States Ship) Submarine, etc.Ī strong nation wants to show its war powers like an aircraft carrier to the world so that its enemies are beware of it. The unique character of the present-day modern submarine is that they move quietly and can appear anywhere to strike the enemy. The potential of submarines is distinct from other warships, and they are different in their design and appearance.Ī single submarine like the OHIO class of the USA can carry a huge amount of firepower that can be destructive and disastrous. Even though most of the submarines are warships, there are few submarines used for other purposes. What is a submarine? How submarine works?Īs it is called, a submarine or sub is a type of warship or vessel that is designed to function independently when submerged under the sea for long periods. The article will take you through the different subtopics on submarines such as: what is a submarine, how a submarine works, what are the different designs of submarines, what are the types of submarines, what are the classes of submarines, what are the most common propulsion systems used on submarines, what is a nuclear submarine, communication and navigation system, and some frequently asked questions related to submarines. This article answers many similar questions on a submarine. Usually, the common public always wonders how a submarine weighing so heavy can do the magic of going down the sea and returning to the surface again.
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