The continuing search is being conducted against fading hopes that the crew of the sub may have survived an apparent explosio...
The U.S. Navy said a "hydro-acoustic anomaly" was produced just hours after contact with the sub was lost on Nov. 15.
The German-built diesel-electric TR-1700 class submarine was set to arrive Monday to a naval base in Mar del Plata.
Calls that had raised hopes of finding an Argentine submarine that has been lost at sea did not come from the crew members.
The submarine, with 44 sailors on board, was last heard from on Wednesday, 268 miles off the Argentine coast.