Argentine navy lost contact with sub [UPDATE: SUB FOUND]

[Jimbuna]

Originally Posted by Skybird

I just realised I have no clue on how long a Diesel boat of this kind can stay submerged without the crew running out of oxygene if Diesels are not running...? This is no 212.

In a "worst-case scenario," the missing sub could run out of oxygen in two days, Argentine navy spokesman Enrique Balbi said Monday.
Under normal circumstances, the vessel has sufficient fuel, water, oil and oxygen to operate for 90 days without external help, said Balbi, and the vessel could "snorkel" -- or raise a tube to the surface -- "to charge batteries and draw fresh air for the crew."
If the sub is bobbing adrift on the surface and the hatch is open, it will have an available air supply and enough food for about 30 days, he said.
But if it is submerged and cannot raise a snorkel, its oxygen may last only about seven days. When the sub last made contact on Wednesday, five days ago, it was submerged, Balbi said.

http://edition.cnn.com/2017/11/20/am...now/index.html

[Falkirion]

I'm curious, assuming the USN have an SSN somewhere nearby, would they be tasked to assist with the search or is that more on whatever other assets the Argentinians/other nations can mobilize?

Really hope the boat and crew is found soon.

[Mork_417]

Still hoping for the best.

[Hartmann]

Originally Posted by Falkirion

I'm curious, assuming the USN have an SSN somewhere nearby, would they be tasked to assist with the search or is that more on whatever other assets the Argentinians/other nations can mobilize?

Really hope the boat and crew is found soon.

Probably some submarine could be in the area right now, but it only works if the Ara Santa fe is alive, or the crew is banging tools against the hull.

SSN can go below the termal layer and good options detecting the Argentinian submarine.

I´m not sure if the active sonar is useful or can detect submarines on the sea floor.

[Skybird]

Originally Posted by Jimbuna

http://edition.cnn.com/2017/11/20/am...now/index.html

Sounds as if the spokesman in that article is somewhat avoiding the question. Mentioning snorkeling and m ission operation time while the sub obviously cannot surface or move, is a distraction.

Their electric did break probably, so implies the news so far, maybe they even had a battery or cable fire, which is worst case, or in toxication of the atmosphere from the betteries, and I take it that the sub sits still on the ground. Who knows how long it was submerged already when the problems showed up. I think you do not snorkel from 70m, or do you?

I fear they are already gone. Its the scenario with the highest probability. Hope I am wrong, though.

[Reece]

I would imagine the batteries nowadays would be sealed.

[Onkel Neal]

Argentina's navy says fresh noises are not from missing submarine

Argentina’s navy has said sounds detected from the bottom of the ocean are not from the submarine which has been missing in rough seas for five days with 44 crew on board.

Spokesman Enrique Balbi said “a biological source” was behind the noises which were picked up by two Argentinian navy ships searching for ARA San Juan and by sonar buoys dropped by a US P8 surveillance plane.

The navy has also revealed the submarine’s last communication, on Wednesday, was to report a mechanical breakdown related to its batteries. Captain Gabriel Galeazzi, who runs the naval base in Mar del Plata, which was the submarine’s destination, said mechanical problems were not uncommon and rarely posed a risk.

[Jimbuna]

Originally Posted by Skybird

I fear they are already gone. Its the scenario with the highest probability. Hope I am wrong, though.

Sadly, I think you may well be right.

[Marcantilan]

Still praying.

[Niume]

I had hope that they may be found the sub then they heard tools getting banged on the hull. But now I have little faith now. One thing good is the weather is clearing up a bit.
Its still unclear to me how much the sub still has Oxygen left.

[AVGWarhawk]

Originally Posted by Niume

I had hope that they may be found the sub then they heard tools getting banged on the hull. But now I have little faith now. One thing good is the weather is clearing up a bit.
Its still unclear to me how much the sub still has Oxygen left.

As of yesterday I believe it was stated 2 days of O2 left. Horrible situation.

[daft]

Originally Posted by AVGWarhawk

As of yesterday I believe it was stated 2 days of O2 left. Horrible situation.

And I assume that is a guess considering how little they know about the series of events.

[TomcatMVD]

Originally Posted by Skybird

Sounds as if the spokesman in that article is somewhat avoiding the question. Mentioning snorkeling and m ission operation time while the sub obviously cannot surface or move, is a distraction.

Their electric did break probably, so implies the news so far, maybe they even had a battery or cable fire, which is worst case, or in toxication of the atmosphere from the betteries, and I take it that the sub sits still on the ground. Who knows how long it was submerged already when the problems showed up. I think you do not snorkel from 70m, or do you?

I fear they are already gone. Its the scenario with the highest probability. Hope I am wrong, though.

The Navy spokesman has been very responsible in how he conveys information. He might have been taken out of context. I heard the interview and he mentioned all possibilities from the starting point that the vessel was known to have been at least at snorkel depth by the time the last message was sent. After that, it either went down with the atmosphere having just been refreshed, or it managed to complete a couple more cycles of snorkeling before whatever happened took place. This is just to illustrate that there is no way of ascertaining with 100% accuracy the available levels of oxygen.

[TomcatMVD]

Argentine navy confirms the "violent" acoustic anomaly "consistent with an explosion" taking place on Wednesday last week and reported yesterday.
The search area's depth varies between 200mts and up to 3000mts as it sits right in the edge of the continental platform.
The acoustic event took place 3 hours after the last communication with the vessel.

[Pirate]

Originally Posted by TomcatMVD

Argentine navy confirms the "violent" acoustic anomaly "consistent with an explosion" taking place on Wednesday last week and reported yesterday.
The search area's depth varies between 200mts and up to 3000mts as it sits right in the edge of the continental platform.
The acoustic event took place 3 hours after the last communication with the vessel.

Dammit!!!
All hope seems to be gone now!