A translation of this article in the attached link:
Looking for the Submarine San Juan, Navy confirmed that this one has not been found, as leaked out
The ship would have suffered a technical failure Wednesday morning. There are 37 people on board.
A rescue operation arranged by the Naval Marine Traffic Command tried to locate an Argentine submarine since last night, with which contact was lost since Wednesday.
The ship "ARA San Juan", which carried out surveillance exercises in the exclusive economic zone, at the height of Puerto Madryn, would have suffered more than 36 hours ago a failure and subsequent fire in the battery bank, the system that stores the energy electric on board
That would be the reason why the contact between the crew was interrupted (37 people, including eight officers) and the Naval Base of Puerto Belgrano.
"The submarine was not found," Navy spokesman Enrique Balbi said amid versions that said he was already located and being transported to a port.
The spokesman's statements broke the secrecy that remained since last night, when the news transcended. "The last communication was on Wednesday," he said and said a search plan for the submarine was deployed.
"The version of the fire is not official information, there could have been a technical failure," Balbi said. "We still do not have communication," he said.
In order to detect the location of the ship, a search and rescue procedure was arranged with the participation of two corvettes and an army plane to track the area.
The "ARA San Juan" (S-42) is a submarine type TR-1700 manufactured in Germany. It was incorporated into the national Navy in 1985. It is conventional electric diesel propulsion and snorkeling system, designed for attacks against surface forces, submarines, merchant traffic and mining operations.
From 2007 to 2014, the submarine abandoned its station at the Mar del Plata naval base for its so-called "half-life" repair, in order to extend its useful life for another 30 years.
Between the carried out works the replacing and integral repair of the 960 elements of their batteries was realized, area where this Wednesday could originate the fault.