"The search will be joined tonight by the Russian Antonov [plane], which will carry an electrosubmarine capable of combing sites up to 6,000 meters deep. But no rescue is possible at such a depth. This could be performed by the US rescue ship if the depth does not exceed 600 meters," Balbi said.
Meanwhile, the depth that the "hydro-acoustic anomaly" was registered at is within 200-1,000 meters, he added.
On Friday evening, local time, Russia’s An-124 landed in the Argentinian city of Komodoro-Rivadavia, en route to Ushuaia. It has a close-knit team of professionals aboard, like operators of the remotely controlled unmanned submarine Panthera plus, deep sea divers and a dive doctor, led by Sergei Bashmakov, chief of Russian Marine Rescue research center.
Argentina is also expecting Yantar, the Russian navy research vessel, to enter the waters off the South Atlantic coast.
The San Juan attack boat, commissioned back in 1985 and refitted nearly 30 years later, fell off the radar screens on November 15, in the middle of its journey. It had a 44-strong crew aboard, Eliana María Krawczyk, the first Argentine and South American woman submariner, among them.