Indonesian submarine gone amiss

[Skybird]

https://www.bbc.com/news/world-asia-56829278

The boat is German-made (probably a type 209) and 43 years old. It underwent an overhaul in Germany end of the 80s, and a 2 year refit in South Korea ten years ago. Its one of five submarines Indonesia is operating.

[Jimbuna]

Hopefully they will be found and in an area a rescue may be undertaken.

[Moonlight]

^There's not a chance of finding them alive and they'll be extremely lucky to find the sub in shallow water within a week or a month never mind that deeper water it reportedly disappeared in.

[Kapitan]

Looking at everything that is coming out I'm hearing the boat is down in 700 to 800m deep waters and well if she is down in one piece the only way she is making that depth is if she flooded first.

Personally and I know I sound like an ass in saying this but i hope the above is not the case and the boat was crushed simply because it would be quick and painless.

But I hope I am totally wrong on both counts

[Buddahaid]

BBC isn't updating which isn't encouraging.

[Kapitan]

The boat went out with 56 men she normally carries 30-36 she has been down for now nearly 2 days

The air in that boat is going to be running out fast

[Jimbuna]

A few hours ago the BBC news on tv estimated they had 72 hours worth of air remaining.

https://www.bbc.com/news/world-asia-56829278

[Catfish]

I read it does not have an emergency docking adapter, also it may be too deep to use any emergency equipment. Looks bad.

[Kapitan]

A few hours ago the BBC news on tv estimated they had 72 hours worth of air remaining.

https://www.bbc.com/news/world-asia-56829278

Likely under ideal situation where the air may not be contaminated, but also the 209 while it can stay down for a considerable time 72 hours for me is a bit hopeful at best.

I read it does not have an emergency docking adapter, also it may be too deep to use any emergency equipment. Looks bad.

Doesn't need an adapter its the rescue vessel that needs the skirt if its going to dock, and that's something LR5 will most certainly have.

The boat is west German designed so its up to NATO standard for sure, even the Russian hatches can work with Western DSRV's (and have)

My fear is if she is down in 700m of water and in one piece that to me says it all, she is flooded right through, the 209 I don't believe could survive that depth intact.

[Skybird]

Their navy says debris found near an oil slick at the sub'S last known position was formed by items form inside the boat that could not have reached to the outside without either huge pressure damage to the hull or damage at the torpedo launchers.

I slowly start to cautiously assume that the boat has imploded very early in the "event". Maybe the implosion was the event.


At least no slow miserable death.

[Jimbuna]

Yeah, most likely :yep:

[Onkel Neal]

https://interestingengineering.com/missing-indonesian-submarine-feared-lost

[Jimbuna]

BBC link: https://www.bbc.com/news/world-asia-56871694

[Mr Quatro]

The German-built diesel-powered KRI Nanggala 402 had been in service in Indonesia since 1981

Forty years of service? Fear of lasting this long should've been the case scenario :yep:

The boat is presumed lost with all on board ... RIP

[mapuc]

No military personal should lose their life in peacetime.

R.I.P

Markus

[Kapitan]

She has now been confirmed sunk

RIP


https://globalnews.ca/news/7786099/missing-submarine-indonesia-sunk-52-dead/

[MaDef]

No military personal should lose their life in peacetime.

R.I.P

MarkusIt's a dangerous job, even in peacetime.

[Jeff-Groves]

There is no safe job now days.
Ask the victims of rouge shooters!
Or maybe victims of people texting while driving or drunk drivers.
I actually fear the latter before the former more!
If you think your safe at a work from home job? Think again!
My home was invaded once. Now I'd see a massive slaughter should anyone be dumb enough to try it again.

[Skybird]

They found it, at 2800 ft. A speaker said the boat has broken up into three pieces.


Detonation?

[mapuc]

They found it, at 2800 ft. A speaker said the boat has broken up into three pieces.


Detonation?

Perhaps but not terrorisme Kursk stile they were training firing live torpedo I guess something went terrible wrong before firing during the firing exercise or right after.

This is nothing but guesses-I'll await the official report.

Markus

[Skybird]

It could very well be like that, mapuc. Some days ago media reported the sub was on a drill, and during that excercise it participated in asked for permission to go deeper than where it was expected to "attack" from. It then was allowed, went deeper, and then "something" happened.



My speculation: maybe they tried to fire a life torpedo from too deep, and the torpedo launcher's hatch door broke from the pressure.

[Furia]

In some report that I have read on the media it mentions that the last communication was the permision to load the torpedo tube. So one can guess that one possibility could be a malfunction that flooded the forward torpedo room when they opened breech door.
Just guessing but it could also happened in a very different way.
Hopefully they will investigate and the cause would be identified.
Rest in Peace.

[Skybird]

My guess:

They asked for permission to go deeper, and I think they went too deep. Then:

- either the depth was what brought them into trouble and collected damage quickly until they broke, or (maybe more likely because of their request to load the tube)

- they asked for permission to load the torpedo tube, the inner tube door sealed or sealed not correctly, the outer one went open and the too big pressure due too excessive depth "entered" the boat via cracking open the inner torpedo tube doors.

Something like this.

[Jimbuna]

Hopefully the truth/reason will come out sooner rather than later.

[Bilge_Rat]

obviously at 800 meters, they are past crush depth.

if it is in only 3 pieces, that could indicate, the sub flooded.

If it was not flooded or partly flooded, it would implode when past crush depth and you would see hundreds of pieces, like the wreckage from the USS Thresher.

If it was flooded, then it would not implode since the water presure inside and outside the sub would equalize, but could have fractured when it hit the ocean floor since it would have been going fairly fast at that point due to gravity.

again, just speculation at this point. You are talking about a very old sub, so we have no idea what shape it was in.

[3catcircus]

obviously at 800 meters, they are past crush depth.

if it is in only 3 pieces, that could indicate, the sub flooded.

If it was not flooded or partly flooded, it would implode when past crush depth and you would see hundreds of pieces, like the wreckage from the USS Thresher.

If it was flooded, then it would not implode since the water presure inside and outside the sub would equalize, but could have fractured when it hit the ocean floor since it would have been going fairly fast at that point due to gravity.

again, just speculation at this point. You are talking about a very old sub, so we have no idea what shape it was in.

Not necessarily. It could have "telescoped" and failed at weld joints. If I recall the type 209s are single hulled and only have two main ballast tanks (as well as trim tanks).

[Rockstar]

Its kinda clickbaitish IMO because even the professor in the video thought it unlikely the wave could have been the sole cause. But it is interesting

ABC Science (https://www.abc.net.au/news/science/)
/ By science reporter Gemma Conroy (https://www.abc.net.au/news/gemma-conroy/13299536)

Posted 2ddays ago

While some speculated that the submarine was hit by a foreign missile or a power blackout, Indonesian authorities now suspect the submarine was pulled under by a powerful underwater current called an internal solitary wave.https://www.abc.net.au/news/science/2021-05-01/indonesian-sunken-submarine-internal-waves-what-do-we-know/100107196

[Sean C]

I posted this over at the cruiser's forum (https://www.cruisersforum.com/forums/f158/invisible-force-sinks-sub-250112.html). Just thought y'all might find it interesting, too.



https://i.imgur.com/YtvzKSqh.png