Indonesia searching for missing submarine with 53 on board

[Thaiyotakamli]

53 minutes ago, Beregond said:

ya. the sea where the sub went missing is 700m in depth,(or 2000f i read some where) if it really sink, its a rescue job 700m under the water. maybe 2000f rescue job,

locating the sub is the key, once they can locate it, they can feed in oxygen and take out carbon dioxide to let the crew last longer

But at 700m its hard to reach the bottom. 

[Playtime]

10 minutes ago, Thaiyotakamli said:

But at 700m its hard to reach the bottom. 

Isn't 700m way past the max depth already?

Pancake lor

[Thaiyotakamli]

6 minutes ago, Playtime said:

Isn't 700m way past the max depth already?

Pancake lor

Yah so basically all the water will enter due to great pressure. 

[Adrianli]

27 minutes ago, Playtime said:

Isn't 700m way past the max depth already?

Pancake lor

Actually hor, 700m is not say very very deep for submarines. I believe the hull will still be in tact. If you have watched the documentary Drain the Ocean on NGC where they showed the various wrecks in the ocean floor, some of the vessels were very much in tact.

https://en.m.wikipedia.org/wiki/Drain_the_Oceans

Edited April 23, 2021 by Adrianli

[Watwheels]

Still no good news.

https://edition.cnn.com/2021/04/23/asia/indonesia-submarine-australia-us-intl-hnk/index.html

Jakarta, Indonesia (CNN)An unidentified object has been spotted at the site of the ongoing search for a missing Indonesian submarine with 53 crew members on board, as authorities warn oxygen on the vessel will run out within 24 hours.

An Indonesian naval vessel detected an object with "strong magnetic resonance" at a depth of 50 to 100 meters (164 to 328 feet), Maj. Gen. Achmad Riad, the head of the military's central information unit, said during a press conference on Friday.

The Indonesian navy expects its warship, the Riguel, to reach the search area Friday morning local time, Riad added. The Riguel is equipped with a high-tech sonar, which uses sound waves to locate objects, and the navy is hopeful it will be able to find the KRI Nanggala-402, a German-made submarine which lost contact during a military exercise in the Bali Strait early morning Wednesday, local time.

Australia, Singapore and the United States are sending support in the search for the missing submarine, with Australia announcing in a press release Friday that it is sending two ships to the site.

"HMA Ships Ballarat and Sirius, both presently at sea on separate regional deployments, are making best speed for the search area," Australia's Defense Department said in a press release Friday.

Rear Adm. Mark Hammond, of the Australian task force, added that his thoughts were with the submariners of KRI Nanggala, their families and the Indonesian people.

"As always, we stand ready to assist our fellow mariners in the Indonesian Navy," he said.

The United States is sending aircraft to assist in the search for the missing Indonesian submarine, Pentagon press secretary John Kirby tweeted Thursday.

"We are deeply saddened by the news of Indonesia's lost submarine, and our thoughts are with the Indonesian sailors and their families," he said.

Kirby also said Secretary of Defense Lloyd Austin will speak with his Indonesian counterpart Friday morning to discuss what else the US can do assist.

Fading hopes

Adm. Yudo Margono, the chief of staff of the Indonesian Navy, said the submarine has sufficient oxygen for 72 hours, meaning it would last until Saturday.

Answering questions on the submarine's condition before participating in the war simulation, Margono said the KRI Nanggala-402 and all of its crew are well prepared. It last docked for maintenance in 2020 in Surabaya, a port city on the island of Java, he said.

The military suspects an oil spill seen in aerial surveillance near the dive point on Wednesday came from the craft. Margono said the Navy also found one object at the depth of 50 to 100 meters (approximately 164 to 28 feet) that was magnetic, meaning it likely came from the submarine.

Margono said there are two possibilities to explain the oil spill spotted on the surface: the submarine tank could be leaking because it dove too deep, or the submarine released fluid on board in an attempt to rise to the surface.

Indonesian Navy spokesman First Adm. Julius Widjojono said the submarine has the capability to dive up to 500 meters (approximately 1,640 feet) below sea level, but authorities estimate it went 100 meters to 200 meters deeper than that.

[Thaiyotakamli]

32 minutes ago, Adrianli said:

Actually hor, 700m is not say very very deep for submarines. I believe the hull will still be in tact. If you have watched the documentary Drain the Ocean on NGC where they showed the various wrecks in the ocean floor, some of the vessels were very much in tact.

https://en.m.wikipedia.org/wiki/Drain_the_Oceans

According to wiki the test depth at 240m

https://en.m.wikipedia.org/wiki/Cakra-class_submarine#CITEREFSaunders2009

[Adrianli]

14 minutes ago, Thaiyotakamli said:

According to wiki the test depth at 240m

https://en.m.wikipedia.org/wiki/Cakra-class_submarine#CITEREFSaunders2009

If you have been in the armed forces, you will know such info is always classified. The public sources are usually a guesstimate only. The armed forces will never publish how far, how long range, how fast and what are its capabilities to the public. 

During my time in the Navy, the speed of our vessels were completely different from the publication of Jane's fighting ships books. We also cannot allow others know how much fuel we can carry and our fuel consumption rate. All these are classified. Even our countermeasures and offensive weapons were not fully declared. 

 

If you look above your post, can see they Indon Navy said in the press the sub can dive 500m which is totally off from your website source.

Edited April 23, 2021 by Adrianli

[Playtime]

1 hour ago, Adrianli said:

 

If you look above your post, can see they Indon Navy said in the press the sub can dive 500m which is totally off from your website source

Suspect it's safe 240m  vs theoretical maximum 500m.

700m definitely way beyond design limits, probably can't even blow ballast tanks at that pressure. It's a small sub. 

Sad to say it's at very best a recovery... maybe even just a verification...  not a rescue liao. 

RIP to them... being a submarine is worst than a tanker...

 

 

 

[Windwaver]

Just hope tat oxygen can reach those trapped in the sub in time

[Thaiyotakamli]

37 minutes ago, Playtime said:

Suspect it's safe 240m  vs theoretical maximum 500m.

700m definitely way beyond design limits, probably can't even blow ballast tanks at that pressure. It's a small sub. 

Sad to say it's at very best a recovery... maybe even just a verification...  not a rescue liao. 

RIP to them... being a submarine is worst than a tanker...

 

 

 

Add on its a 1977 sub. So i doubt the same capability they had when first launch

[Playtime]

 

 

 

https://www.abc.net.au/news/2021-04-24/indonesian-submarine-search-enters-critical-phase/100092532

 

Indonesia's missing submarine is believed to have run out of oxygen, but the search continues

Posted Yesterday at 10:18pm, updated 7hhours ago

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume.WATCH

Duration: 2 minutes 41 seconds2m 41s

The 43-year-old vessel is carrying 53 crew members.

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A string of countries including Australia is continuing to assist Indonesian authorities in their search for a missing submarine and its 53 inhabitants, whose prospects of being found alive are running thin. 

Key points:

Search teams are scouring the ocean floor for signs of life 

The Indonesian Navy has found an object 100 metres below the sea 

An expert in military technology says chances of survival are quite low

The Indonesian military have said the vessel's oxygen supplies would run out on Saturday at 5:00am AEST. 

There are also mounting concerns the 43-year-old vessel may have sunk too deep to reach or recover the stranded 53 crew, which includes the head of Indonesia's submarine fleet. 

The Indonesian Navy's KRI Nanggala 402 submarine went missing on Wednesday, after it failed to re-emerge from its last reported dive in waters near Bali. 

While Indonesian authorities have had their search bolstered by a sonar-equipped Australian warship with a helicopter, there have been no signs of life so far. 

So what happens from here? 

Who and what is doing the searching?

 

The HMAS Ballarat will be joined by US, Singaporean, and Malaysian craft.(

Supplied: Department Of Defence/Kylie Jagiello

)

Twenty-four Indonesian ships and a patrol plane were mobilised for the search on Friday, with similar large searches made in the past two days. 

An Indonesian air force pilot told Reuters that six tonnes of equipment had been flown to a base to help with the search including underwater balloons to help lift a vessel.

An American P-8 Posiedon reconissance aircraft was expected to join the search on Saturday. 

 

The US Navy's P-8 Poseidon fleet have been utilised for various sea searches in the past.(

AAP: Richard Wainwright

)

Australia is sending two navy ships: the long-range frigate HMAS Ballarat, and HMAS Sirius, which is a navy refueling ship.

"These two Australian ships will help expand the search area and extend the duration of the search effort," Australian Navy Rear Admiral Mark Hammond said.

Singaporean and Malaysian rescue ships were also expected in the coming days.

Marcus Hellyer, a senior analyst focussing on defence capability and military technology at the Australian Strategic Policy Institute, told Radio National's PM that Australia's vessels were constrained in their ability to help.

"The Sirius is essentially a big oil tanker, so there's not much you can do except maybe refill ships at sea," Dr Hellyer said.

"And the Ballarat is a frigate, which does have sonar capacity, but not the kind of hydrographic sonars you'd need to be able to detect objects in deep water."

What has been found so far?

 

Oil slicks were seen in the submarine search area.(

AP: Eric Ireng

)

Indonesian search parties have focused on an area where an oil slick was found after the submarine disappeared.

Indonesia's Navy Chief of Staff Yudo Margon also said an unidentified object exhibiting high magnetism was located at a depth of 50 to 100 metres, and officials held out hope it is the submarine.

But the navy said it believes that the submarine sank to a depth of 600-700 metres, much deeper than its collapse depth, at which water pressure would be greater than the hull could withstand.

The Bali Sea can reach depths of more than 1,500 metres.

The vessel's collapse depth was estimated at 200 metres by a South Korean company that refitted the ageing vessel in 2009-2012.

Do we know what caused the accident?

 

The KRI Nanggala pictured in 2014.(

AP: Eric Ireng

)

The cause of the disappearance is still uncertain.

The navy said an electrical failure could have left the submarine unable to execute emergency procedures to resurface.

Admiral Margono also suggested oil could have spilled from a crack in the submarine's fuel tank, or the crew could have released fuel and fluids to reduce the vessel's weight so it could surface.

But there has been no conclusive evidence the oil slick was from the sub.

What chances are there of survival?

 

Indonesia's National Search and Rescue Agency (BASARNAS) are currently leading the search.(

AP: Firdia Lisnawati

)

Dr Hellyer said submarine accidents were often "catastrophic".

In 2000, the Russian nuclear submarine Kursk suffered internal explosions and sank during manoeuvres in the Barents Sea.

Most of its 118 crew died instantly, but 23 men fled to a rear compartment before they later died, most of suffocation.

And in November 2017, an Argentine submarine went missing with 44 crew members in the South Atlantic, almost a year before its wreckage was found at a depth of 800 metres. 

"It is very rare that there are people left alive after an initial leak, explosion, or mechanical fire," Dr Hellyer said. 

"When things go bad, they tend to go catastrophically bad."

YOUTUBEThe World: Desperate search for missing Indonesian submarine

Dr Hellyer said there has only been one successful deep-water submarine rescue in the history of submarine operation, that being the rescue of the USS Squalus in 1939.

The vessel was diving in the North Atlantic near the state of New Hampshire, but sank after a valve failed, flooding the vessel. It sank to a depth of 73 metres. 

Crew travelling in an adjacent submarine sounded the alarm and were able to pinpoint the location of the downed vessel, with 33 survivors onboard later rescued.

 

US authorities pictured trying to salvage the Squalus in 1939.(

US Navy

)

"They knew exactly where the submarine was, and happened to be near a submarine base," Dr Hellyer said. 

"Fortunately, they were able to save those members of the crew who survived.

"But that is the exception."

ABC/wires

[RadX]

Gone case

[RadX]

Missing Indonesian submarine has sunk, objects recovered: Military chief 
https://www.channelnewsasia.com/news/asia/indonesia-missing-submarine-sank-debris-found-kri-nanggala-14685170

[Tohto]

Torpedo failed to launch and exploded?

[Playtime]

Question now is would they risk sending people down... since no survivors. 

[Ho2786]

 

[Ct3833]

1 hour ago, RadX said:

Missing Indonesian submarine has sunk, objects recovered: Military chief 
https://www.channelnewsasia.com/news/asia/indonesia-missing-submarine-sank-debris-found-kri-nanggala-14685170

can only pray for miracle while be prepared to accept the eventual reality.

[Adrianli]

1 hour ago, Tohto said:

Torpedo failed to launch and exploded?

I doubt any torpedo exploded. It would have registered a significant reading on the Richter scale for undersea earthquake measurements. Looks more like the submarine has been crushed, it dived too deep.