Russia has joined for searching Argentine Military Submarine that has gone missing a week ago. It has carried 44 crew members in the southern Atlantic.
Argentina President Macri said that his Russian counterpart Vladimir had called him to offer to place a survey vessel with the experience of some operations.
The San Juan submarine vanished while returning from a routine mission near the southern tip of South America when it started a mechanical breakdown.
It had made the last contact with the navy officers on November 15th.
Ignorance of noise:
A spokesman said that they entered a critical phase amid that frightens that oxygen supplies may be run out.
He also added that the Navy was investigating on loud noise detected in the area after submarine gone missing.
The Navy officers said it as a hydroacoustic anomaly and they rejected to confirm whether there had an explosion.
Some countries helping:
The UK, Chile, Brazil, Columbia, Peru, Germany, South Africa, The USA, and Uruguay are the countries that have been sent the ships or the planes to help with the search.
The US Navy has placed two underwater vehicles which can be used sonar to create the images of the sea ground.
NASA research has flown over the search area but it has failed to mark anything.