Вот Как погружаются и держатся на плаву подводные лодки

The design and physics of modern submarines represent a captivating balancing act between the abyss and the ocean's surface. The design of these multi-ton steel giants is based on Archimedes' principle, which dictates that the enormous volume of displaced water pushes the heavy vessel upward. Documentaries often overlook the minute details of this hidden struggle for survival, where every maneuver requires pinpoint precision in the control of ballast systems. The submarine's design follows the Russian doll principle: a robust inner hull protects the crew and equipment from colossal hydrostatic pressure, while the lightweight outer hull forms special tanks. These ballast tanks play a crucial role in buoyancy control. When surfaced, they are filled with air, making the ship as light as a float. To perform a diving maneuver, the commander activates the ventilation valves, opening the upper flaps. The trapped air rushes out, and seawater roars through the lower scuppers, filling the voids, turning the vessel into a heavy stone, sinking into darkness. In the depths of the ocean, a complex process begins: maintaining depth and achieving zero buoyancy. The density of the marine environment constantly changes depending on temperature, currents, and salinity levels. To prevent the heavy machine from falling into an underwater hole or crashing on the rocks, engineers use surge tanks. Pumps dose the liquid weight in portions, pumping out or accepting water, helping to achieve perfect equilibrium. Underwater, the submarine performs full-fledged flight in the dense hydrosphere, using horizontal rudders like the wings of an airplane. Any movement of cargo or synchronized crew pitch changes the trim, which the automatic system instantly compensates for by transferring fluid between the bow and stern compartments. In the event of a critical accident and flooding, the emergency ballast release system is activated, when compressed gas under incredible pressure displaces the water, literally throwing the titanium ship to the surface."