Search effort "tripled" for missing sub

20 November 2017

Officials at Argentina's Mar del Plata naval base said that the search effort for a submarine missing in the South Atlantic had been "tripled". Authorities tried to verify that recent satellite calls seen as a sign the sailors were alive came from the vessel. The submarine ARA San Juan was inaugurated in 1983. It was built in Germany and underwent maintenance in 2008 in Argentina.