Indonesian submarine Nanggala-402 missing in the Bali region found

The Indonesian navy found the Nanggala-402 submarine that disappeared near the island of Bali, all 53 people on board were killed. This was reported by the press service of the Ministry of Defense of Indonesia.

The submarine was discovered at a depth of 850 meters, the hull of the submarine broke into three parts. As the commander-in-chief of the Armed Forces of Indonesia, Marshal aviation Hadi Tchahjanto, the sub was not designed to dive to such depths. The supply of oxygen on the submarine was supposed to run out on Saturday night. All on board were declared dead.

The chief of the main headquarters of the Indonesian Navy, Admiral Yudo Margono, told reporters that the status of the submarine had changed from "missing" to "sunken." The Indonesian authorities officially recognized the submarine as sunken and the crew dead. Whether the work on raising the submarine from the bottom will be continued is not reported yet.

Recall that communication with the KRI Nanggala 402 submarine was lost during the exercises on April 21, 2021, when the submarine was supposed to conduct torpedo launches during naval exercises in the Bali region. In due time, the submarine did not get in touch, all attempts to contact her ended in failure. There were 53 people on board the submarine.

Diesel-electric submarine KRI Nanggala 402 was built in Germany in 1981, in 2011 it was modernized. The main armament is 533 mm torpedoes, 14 ammunition, eight torpedo tubes. Full displacement - 1,395 tons, length - 59,5 meters, width - 6,3 meters, speed - 21,5 knots.

Comments

[Victor_B]

The possible fate of any submariner ...

[Clear]

Quote: Victor_B

The possible fate of any submariner ...

Lord, save their souls.

[novel66]

sorry guys, it's not said in vain ..

Submariners pay whatever they want, because anyway they will soon all drown or explode ... "

[Black lotos]

Quote: novel xnumx

Submariners pay whatever they want, because they will soon all drown or explode

Andrey Zotikov - We and you went hiking.
Attributed to the father of the king in the order
Drowning in peacetime ... is a tragedy.

[hydrox]

It doesn't sink ...
If the boat was blown into 3 parts, then it is, rather, a detonation of ammunition.

[ABC-schutze]

"According to him, the submarine commander requested permission to dive, after which at 16:30 (12:30 Moscow time) he was supposed to launch torpedoes, but the boat did not get in touch, does not respond to requests and its location is unknown. ..."
************************************************** *********************
This is a quote from the previous VO "info" on this topic. I am far from military affairs, but ... If the commander requested permission to dive, it is possible that the submarine was on the surface. And, the crew (commander), having received the command for a (possibly urgent ...) dive, simply did not control the closure of the hatch. As I understand it, it is no longer possible to "fix" such a puncture ... Such or similar precedents, alas, have taken place. Even when the submarine left for repair, in the Far East, Halibut "went to the bottom", due to the fact that the commander, who had lost practice, did not give the crew the command to "look around in the compartments", and the crew, accordingly, had a "reflex instinct" to do it , for the same reason lost. The TA turned out to be clogged with factory debris and their lids did not close properly. True, then there were no casualties and the PL was raised.

[ABC-schutze]

By the way, whether there were explosions on the boat, or whether it “naturally broke down” when plunging to extreme depths, the US Navy could tell for sure, whose sensors of the PLO system display the acoustic picture in the world's oceans with sufficient quality. For the "noise spectra" in the first and second cases are different. But the States are unlikely to share this information with anyone ...

[novel66]

Lady my regards

[Clear]

Quote: novel xnumx

Lady my regards

Hello Roman. Happy Palm Sunday!

[petrol cutter]

In general, naval deaths are usually fierce!
I never wanted to serve in the navy. Actually.

[Mountain shooter]

Quote: Petrol cutter

In general, naval deaths are usually fierce!

All divers are desperate, brave people. Outside are the salty and cold waters of the world's oceans compressed by tens of atmospheres. Indifferent and deadly. What happened to her that shattered into pieces? An explosion on board? A blow to the bottom of such force that the body tore apart?

[NIKN]

Quote: Mountain Shooter

What happened to her that shattered into pieces?

Apparently crushed, and the damaged power structure broke as it happened, somewhere weaker there and broke

[petrol cutter]

I am not a professional.
But there is a feeling that there was an explosion on board. And it is likely not alone.
These are just my guesses.
The case will never fall apart into three parts just like that. With nothing to do ...

[geniy]

But there is a feeling that there was an explosion on board. And it is likely not alone.

And I think that you are absolutely right. You have expressed an ingenious guess.
But here's the nuance, many laymen think that only explosives explode, but in fact, there was diesel fuel on the submarine - which also explodes under certain conditions - and there was also hydrogen formed during the operation of batteries. And at the same time, everyone forgets that at the moment when the submarine body is crushed, the air inside its parts instantly compresses and also instantly heats up to a temperature of up to 400 degrees - the flash point.

[petrol cutter]

This is why I am reporting. I am not a professional in this matter.
I only once stood somewhere nearby.
Somewhere I participated in something.

[antivirus]

that's lucky kohlam - their only one in the Crima rusts. everyone will be healthier

[petrol cutter]

It should be borne in mind that sea water is simultaneously supplied to the hull in commercial quantities ...
Which leads to some kind of cooling of the compartments of the sinking submarine.

[geniy]

sea ​​water enters the hull at the same time in marketable quantities ...
Which leads to some kind of cooling of the compartments of the sinking submarine.

But this is not at all a fact that water cools - that is, it has time to cool. No, if the compression process is stretched for minutes, then of course the water will cool. But the fact is that the crushing process takes tenths of a second in time. And the water acts as a piston for the intra-compartment air - it moves forward into the empty volume occupied by air for it, so that the air is instantly compressed and instantly heated, but it will cool down many minutes later.
And it is also possible such a process that the batteries flooded with water began to vigorously release hydrogen, from this hydrogen began to displace the water and the sections of copper wires were exposed, which created sparks and an explosion of hydrogen. Few people know, something similar happened: in 1905 in Vladivostok, right at the pier, the first submarine Dolphin exploded - it had a gasoline engine and its vapors exploded. So - they picked her up with a crane and began to pull her out. But apparently a spark from the batteries slipped through and an explosion occurred again. She was immediately lowered into the water. And then they began to raise again - and again the explosion. And so it happened 13 TIMES !!! Thirteen explosions!
And by the way, also during the war: when surface ships pursue an enemy submarine and it dies at great depths, they often hear an underwater explosion of the submarine. And everyone mistakenly thinks that her ammunition has exploded, but this, in principle, cannot be, because the fuses at the torpedoes are unscrewed during storage. and most likely submarine explosions under water are either of a physicochemical nature, or it is an instant crushing of the hull.

[Crimean partisan 1974]

And it is also possible such a process that the batteries flooded with water began to vigorously emit hydrogen,

......exactly

[Popandos]

I apologize, but you wrote complete nonsense.
Water enters the inside of the case through the hole, gradually displacing the air, so there can be no pressure surges occurring in a fraction of a second.

it is possible such a process that the batteries flooded with water began to vigorously emit hydrogen, from this hydrogen began to displace water and exposed sections of copper wires,

Where did the water come from? Don't confuse cause with effect. And how will hydrogen strip the wiring?
Even 13 explosions on the boat did not lead to a break in the hull, judging by your story, and in those days the boats were less durable than modern ones.

[petrol cutter]

"But this is not at all a fact that water cools - that is, it has time to cool. No, if the compression process is stretched for minutes, then of course the water will cool. But the fact is that the crushing process takes tenths of a second in time."
The idea is certainly interesting.
However, there are big doubts that the boat instantly fell to unbelievable depths and the hull was crushed in seconds. Usually this process still takes some time. The crew was very lucky then. Sorry for the dark humor ... I'd rather die quicker / since I had to.
In practice, I did not observe instant flooding. They are somehow gradually occurring, at the very least.

[geniy]

However, there are big doubts that the boat instantly fell to unbelievable depths and the hull was crushed in seconds. Usually this process still takes some time.

No, you are mistaken.
The fact is that submarines in a submerged position have a very small buoyancy reserve - no more than 1-2%, and sometimes it is negative and the submarine hangs on horizontal rudders. Compared to surface ships, this is very small, since NK has a buoyancy reserve of 100% 150%, and aircraft carriers have up to 200%. Therefore, it is enough to pour only a few tons of water inside the submarine, as it will completely lose its buoyancy and begin to fall to the bottom, and even if the process of falling to the bottom is not instantaneous, as you think, but very fast. And moreover, almost never submarines do not sink in a horizontal position - and almost always with a large trim to the bow or stern - as Popandos correctly wrote. And therefore, even if high-pressure air is supplied to the main ballast tanks, their kingstones (holes in the lower part) will turn out to be one higher than the other and immediately bleed the air from the VVD. So the rescue of the submarine in such a situation is no longer possible. And surface ships have a huge buoyancy reserve, they really fill up with water for a very long time, and then quickly fall to the bottom.
BUT the fact is that you are confusing the process of filling with water and the process of breaking the hull. So - when a submarine falls uncontrollably to the bottom, it crosses the maximum depth at which its hull is inevitably crushed by water pressure. And this process takes place almost instantly - in a split second. Because the steel of the body collapses due to cracks, and cracks grow at the speed of sound in steel - that is, 7 kilometers per second. And even if the case is 10 meters in diameter, a crack will tear it apart in a thousandth of a second. So the process of destruction is accompanied by a loud sound - as if an underwater explosion had occurred. So, for example, on a test dive of a German submarine of either 21 or 23 projects at the maximum depth, an explosion suddenly sounded above the boat, although there was no enemy nearby. Upon surfacing, it turned out that the water pressure simply crushed the emergency buoy.

[Popandos]

Don't confuse root cause with consequences.
Diesel fuel in no way can explode on a boat, just because it is stored in outboard tanks, and as it is consumed, it is replaced by outboard water. Inside the sturdy hull, there is only a service tank, with a small supply of fuel.

[Popandos]

Good day. The boat breaks to pieces by pressure + impact on the ground, at a depth of 850 m the pressure is 85 kg / cm2, this is ... how much. As a rule, the boat sinks with a large deflection to the bow or stern, which also increases the chance of the hull breaking when hitting the ground.
An explosion, as a rule, leads to a hole, in which case the boat is partially or completely flooded, as a result the pressure inside and outside is equalized, and the boat sinks intact but with a hole.

[Narak-zempo]

Quote: Petrol cutter

In general, naval deaths are usually fierce!

But relatively fast.
But in the couch troops it sometimes stretches for decades.

[Pastor]

It was not necessary to get the oars in the submerged position ...
This is ironic, of course. It is a pity for the sailors, especially if the reason was the populist command from above.

[knn54]

Interestingly, is it worth excluding the possibility of detonation on a mine left over from WWII?

[novel66]

in Indonesia - almost certainly

[Popandos]

Hardly a mine, anchor and bottom mines are not placed at such a depth.

[Reserve buildbat]

Well, at least they found it. Now to raise or not - let the experts decide. But a mass grave ... Sorry for the sailors

[petrol cutter]

Why three parts? The hull broke ...
This cannot be the case when the boat drowns itself.
Maximum - compression from unbearable depth and destruction from unintended outboard pressure.

[Dmitry Potapov]

After the Kursk, one would like to pay tribute to any submariners who died in peacetime. Truly, one fate for the entire crew!

[The leader of the Redskins]

It is customary for us to say:
rest, Lord, the souls of the lost.
I don't know how it is with them, with their religion. Let it be ours.

[Alien From]

Rest the ocean of their souls!

[stroybat ZABVO]

B7 greetings from Argentina.
Is this submarine from the same series as the Argentine?

[Prisoner]

Sadly, I really wanted to hope for the best.

[Stepan S]

In any case, the boat must be examined and the causes of the explosion established. Other disasters can be avoided this way.

[Graz]

the question is whether there is money for this, the depth is large enough, the work will be very expensive in terms of rise. it is possible that they will be as the cost of several such boats

[Baron pardus]

The reason is important to me. Either the Germans made a marriage, or the crew made a mistake. Well, or maybe the mechanics at the port have messed up something. Acoustics did not report an explosion, which means that the explosion of the BC is excluded.

[Crimean partisan 1974]

Either the Germans made a marriage, or the crew made a mistake.

... the fault of the command ... since the DPL has already turned 40 years old ... there either in training without immersion or for cancellation ... well, their command decided to dispose of together with the crew ..... this is hinted at by the fact that she had problems with the equipment before going to the shooting ... all the point

[Graz]

if they want to establish the exact reason. then parts of the boat must be raised, if this is not a priority, then the resting place of the crew is recognized as a mass grave and the case is closed on this, let them decide for themselves

[seregatara1969]

Something small displacement hurt, less than one and a half tons. Aftop burns

[agoran]

All sailors are submarine, regardless of countries, honor and respect.
Condolences to the dead, relatives.