More than a dozen airplanes and ships are participating in the multinational search despite stormy weather that has caused waves of more than 20 feet (6 meters). Search teams are combing an area of some 185,000 square miles (480,000 square kilometers). More than a dozen countries have sent resources to take part in the search. The U.S. government has sent two P-8 Poseidons, a naval research ship, a submarine rescue chamber and sonar-equipped underwater vehicles. U.S. Navy sailors from the San Diego-based Undersea Rescue Command are also helping with the search.
The navy has said the submarine reported a battery failure before it went missing. Now, the rescue teams decided to return to a previously search area where a noise made a week ago in the South Atlantic could provide a clue to the vessel’s location. The “hydro-acoustic anomaly” was determined by the United States and specialist agencies to have been produced Nov. 15, just hours after the final contact with the ARA San Juan submarine. The sound originated about 30 miles north of the submarine’s last registered position. Argentine navy protocol stipulates that in peace time, submarines make contact twice a day with the base but no contact from the submarine existed in the last week. Eliana María Krawczyk, the first female officer in Argentina to serve on a submarine is a member of the submarine crew.