The Automatic Ground Collision Avoidance System reportedly saved an F16 flying over Syria.
More details have been emerging in the German press about Andreas Lubitz and the circumstances of the crash.
The Germanwings crash on Tuesday was not the first of its kind.
Airline founder says "rogue pilot element" puts lives in danger following Germanwings crash.
Germanwings co-pilot Andreas Lubitz, who lived with his parents in a small town, had 600 hours of flight experience.
The German co-pilot was left in sole control of the plane and pressed a button that sent the jet into its descent.
In wake of Germanwings crash, experts call for updated technology to pinpoint crash locations.
The airline is using 11 planes from other airlines to cover 40 of its flights today as staff mourn.
10 killed in crash near Andes include London 2012 gold medalist, veteran yachtswoman and Olympic boxer.
The Boeing 777 aircraft disappeared on March 8 2014, carrying 239 passengers and crew shortly after taking off.
More than 30 bodies have now been recovered, along with pieces of the broken-up plane.
Rescuers believe they have found the plane on the ocean floor off Borneo