Argentine sub has gone missing.

@cokecan I found this item, dating from June 2018, on this Web page:

El Gobierno reconoció que el único submarino de la Argentina "no está operativo" - TN.com.ar

An automatic translation reads:


'The Government recognized that the only submarine in Argentina "is not operational"

Marcos Peña confirmed the information that TN.com.ar revealed in April. The ARA Salta has limitations in the useful life of its batteries, loss of air and has two obsolete radio beacons.

The disappearance of ARA San Juan undressed the worrying state in which the fleet of the Argentine Navy is located. Their units are old and the maintenance is not adequate. Thus, while the investigation carried out by Judge Marta Yáñez is getting closer and closer to the hypothesis that the ship was lost in the ocean floor due to the serious flaws it presented, the Government recognized that the only submarine it has the naval force " is not operative ".
This is the ARA Salta, which according to a report by the General Inspection of the Navy, which revealed TN.com.ar in April , "has deficiencies in its operational equipment." Now, the Chief of Staff, Marcos Peña, acknowledged in his latest management report that the unit is not in a position to navigate and that its useful life "depends on the decisions made regarding battery changes and modernization of its equipment". In this way, Argentina no longer has any submarine capable of protecting its maritime platform, at least until the repair of the ARA Santa Cruz is completed.

In 2016, the then inspector general of the Navy, Guillermo Luis Lezama, informed the former chief of the Navy Staff, Marcelo Srur, that the ship had serious structural failures. The document listed several shortcomings and shortcomings, similar to the disadvantages suffered by the ARA San Juan. The most important anomaly is the limitation in the useful life of its batteries , which according to experts and ex-Navy commanders consulted by this site may be the greatest danger of a boat of this class.

The document also stated that the ARA Salta has two obsolete radio beacons(whose frequency is not compatible with the SAR communications system), a control console in automatic mode out of service and an emergency HF antenna system that does not work either . In turn, the mast of the observation periscope of the ship is out of service and the unit has a loss of air by the expansion joint of the shaft line tunnel in the ballast tank No. 1. To this list is He adds that passive sonar is, according to Lezama, "very unreliable" to navigate in immersion.'

I don't speak Spanish but have pasted the report images as thumbnails in case another interested Arrser does.

The same website also contained this interesting story from May 2018:

ARA San Juan: la Justicia investiga si falló la válvula que debía evitar el ingreso de agua - TN.com.ar


'ARA San Juan: Justice investigates if the valve that should prevent the entry of water failed

A report had warned about the problems of the mechanism. And he had requested that the boat be repaired in a dry dock.
In this sense, a question reveals to the investigation by these hours: the supposed damage of a valve that had to avoid the entrance of water and it did not do it. The description and location of the same is kept under strict reservation
Six months after the disappearance of ARA San Juan, the judge of Caleta Olivia, Marta Yáñez , handles several hypotheses about what could have happened with the ship, although one stands out with force: the naval unit was not in condition due to the lack of maintenance.
In a recent interview with journalist Marcos Barroca for TN , the judge said that it is possible to "get to the truth" even if the submarine is never found. For the researchers, the failure of this valve occurred because it was not sealed , that is, the disc that closes on two lips did not do it correctly.
To try to arrive at this conclusion, the Justice is based on documents delivered by the Navy that expose the alarming state of the unit and in which the entrance to dry dock of the same is requested to be repaired. A report by the General Inspectorate of the Navy of 2016 detailed inconveniences in the valves of the submarine.

In spite of the secrecy, a source with arrival to the cause told TN.com.ar that the possible malfunction of the check valve in the snorkel (where water entered) that closes when seawater enters is investigated . Before Yanez, the submariners and extruders of the ARA San Juan agreed that if the water intake occurred it was because the mechanism was damaged and that if it was not in condition it was due to the lack of repair of the boat in the shipyards.
Technically, the snorkel valves are known as "interceptors". There are two: one external and one internal . They are essential to avoid the entry of water and should only be opened in case the conditions are given. There is a third of them, which closes only in case of emergency: it creates a well where all the water that enters and where the extractors of the battery draw air.
Despite the particular interest in confirming the failure of this valve, justice does not rule out that the failure could have been caused by other circumstances. So much so that the judge wants to deepen the investigation into the failure suffered by the submarine before leaving Ushuaia. Yáñez believes that the crew members who got off before the last trip and who testified about this failure downplayed the problem.
The submariners Juan Gabriel Viana and Humberto René Vilte declared that the failure in the submarine - which delayed one day its return to Mar del Plata - was that a coil of the batteries burned and had to be repaired manually, without technical assistance. Family members suspect that both were "pressured" by the Navy to give this version. Justice also doubts the lightness with which they referred to these problems.'

Interesting stuff and it looks like money and resources may be at the root of the loss of the ARA San Juan.

5b342c4a8acc0_focal_1.JPG 5b342c8c3578a_ara_salta_12.JPG 5b342ca7069a4_ara_salta_13.JPG 5afb6930a3908ara_san_juan_1.JPG
 
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Shame, if only the maps in Argentinian schools proving how shallow the water is between them and the Malvinas were totally correct.
 
A last post from the same source as above. This dealing with evidence given in April by sailors who left the San Juan just before its final voyage:

ARA San Juan: one of the crew that got off in Ushuaia revealed that they heard "three noises in the hull"
René Humberto Vilte presented before the bicameral commission of the Congress. He assured that the snorkel valve had "too much sensitivity".

Published: 07/04/2018, 01:27 hs.Last update: 07/04/2018, 01:27 hs.

One of the two ARA San Juan crew members who left the boat in Ushuaia, days before the last and tragic departure to Mar del Plata, revealed new inconveniences that the ship suffered in the initial trip while traveling to the south of the country. Corporal René Humberto Vilte said there were problems with the snorkel head valve and that "they felt three blows " on the outside of the hull.

Visibly nervous and with a striking lack of information about various issues related to the navigability of the submarine, Vilte responded to questions from the bicameral investigative committee of the Congress that tries to determine what were the reasons for the disappearance. There, he noted that on the road to Ushuaia the ship suffered inconveniences with "two isolated cases."

"The first problem was with the sensitivity of the electrodes of the snorkel head valve , which caused the minimum contact with the water to close, this did not let air pass, and the engines could not be vacuumed, so they went out It also did not let us charge the batteries, this was reported by the officer on duty to the chief of propulsion, they solved it and went back to testing mechanisms, "explained the sailor, who at the insistence of the legislators to clarify this situation, failed to do so.

TN.com.ar could know that the snorkel valve is a double plate that closes against a rubber gasket, located at the tip of the snorkel mast. It is operated hydraulically and its sensitivity can be regulated. "In this way, you can predict the wave that is going to clog and close to prevent the entry of water," explained a former submariner to this site.

During his presentation, Vilte relativized the importance of the problem, however, the source consulted by TN.com.ar provided another panorama: "If they had a regulatory problem, the valve head could have been opened and become a conduit for entry of Direct water to the snorkel well, from where the fans then take air in. This could have caused the submarine to break down. "

In addition to Vilte, the lieutenant of ship Juan Gabriel Viana also was present at the Congress. He is the other member of the crew that got off in Ushuaia. In fact, the sailor said he did not know if this problem was repaired before the last trip to the Mar del Plata Naval Base. "I can not say whether the electrodes were repaired or not," he said.

The second damage that the ship presented during the initial journey consisted of three "strong" hits recorded on the hull of the unit. "The commanding officer of the guard ordered silence to sound and then we detected that the blows were at the height of the hatch main battery hatch," he explained. According to Vilte, after the third blow the situation did not happen again.

"It was found that it was the cover lining of the roof, which is located outside, in the resistant hull, it was opened by some wave", added the first corporal, who denied that seawater could have entered through this sector. . Vilte added that the fault was "repaired" in Ushuaia, and argued that the cover "should have been out of order".
 
@Red Hander

Link translated. I notice it is from May 16th.
Much of this I think has already been covered.

ARA San Juan: la Justicia investiga si falló la válvula que debía evitar el ingreso de agua - TN.com.ar


ARA San Juan: Justice investigates if the valve that should prevent the entry of water failed
A report had warned about the problems of the mechanism. And he had requested that the boat be repaired in a dry dock.

Six months after the disappearance of ARA San Juan, the judge of Caleta Olivia, Marta Yáñez, works with several hypotheses about what could have happened with the boat, although one stands out clearly: the naval unit was not in condition due to the lack of maintenance.
In this sense, a question revealed to the investigation: the supposed damage of a valve that had to stop the water entering and did not do it.

The description and location of the same is kept under strict secret. In a recent interview with journalist Marcos Barroca for TN, the judge said that it is possible to "get to the truth" even if the submarine is never found. For the researchers, the failure of this valve occurred because it was not sealed, that is, the disc that closes on two lips did not do so correctly.
To arrive at this conclusion, the Justice bases it on documents delivered by the Navy that expose the alarming state of the unit and in which the entrance to dry dock of the same is requested to allow it to be repaired. A report by the General Inspectorate of the Navy of 2016 detailed defects in the valves of the submarine.

In spite of the secrecy, an informed source told TN.com.ar that the possible malfunction of the check valve in the snorkel (where water entered) that closes when seawater enters is being investigated. In front of Yanez, the submariners and extruders of the ARA San Juan agreed that if the water intake occurred it was because the mechanism was damaged and that if it was not in condition it was due to the lack of repair of the boat in the docks.

Technically, the snorkel valves are known as "interceptors". There are two: one external and one internal. They are essential to avoid the entry of water and should only be opened in certain conditions. There is a third, which closes only in case of emergency: it creates a well where all the water that enters and where the extractors of the battery draw air. Despite the particular interest in confirming the failure of this valve, justice does not rule out that the failure could have been caused by other circumstances. So much so that the judge wants to deepen the investigation into the failure suffered by the submarine before leaving Ushuaia. Yáñez believes that the crew members who got off before the last trip and who testified about this failure downplayed the problem.

The submariners Juan Gabriel Viana and Humberto René Vilte declared that the failure in the submarine - which delayed one day its return to Mar del Plata - was that a coil of the batteries burned and had to be repaired manually, without technical assistance. Family members suspect that both were "pressured" by the Navy to give this version. Justice also doubts the lightness with which they referred to these problems.
 

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