Indonesia's Submarine KRI Nanggala Wreckage found|Indonesia's Submarine Accident

On 21st April 2021 Indonesian submarine KRI Nanggala disappeared after requesting permission to dive during a torpedo drill. The German-built vessel was more than 40 years old but underwent a refit in 2012.
The navy chief of staff, Yudo Margono, said that a sonar scan had detected a submarine at 850 metres (2,790ft), beyond the Nanggala’s diving range.
Every submarine hull has two major components, the light hull and the pressure hull. These are unique structures to hold water in them to enable the submarine maintain buoyancy underwater. The light hull is the outer non-watertight which provides the submarine a hydrodynamically efficient shape. The pressure hull withstands the hydrostatic pressure at a depth at which the submarine is designed to operate. Each submarine hull is designed to withstand the pressure up to a certain depth, beyond which it would simply crush due to the hydrostatic force at that depth. For this reason, every submarine has a diving depth. What decides the maximum crushing depth of the submarine is generally the thickness of the hull and the type of material.
The Indonesian submarine, it is suspected to have a power failure which resulted in the malfunction of some control system and therefore, may have lost control and sunk beyond its crushing depth.
Submarines can be categorized into two types based on the kind of engine they run on: diesel-electric or nuclear. KRI Nanggala is diesel-electric submarine.
Nuclear subs, on the other hand, rely on the power generated by the nuclear reactor onboard. The reactor generates enough power to run all electronic and electrical systems onboard, in addition to the life support systems of the crew. Therefore, unlike diesel subs, nuclear subs can go for days, or even weeks without surfacing a single time. My big salute to the fallen sailors.
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Видео Indonesia's Submarine KRI Nanggala Wreckage found|Indonesia's Submarine Accident канала Rajendra Prasad