http://www.foxnews.com/world/2014/0...ck-boxes-before-batteries-die-searchers-must/
After the excruciating 17-day wait for confirmation that the Boeing 777 crashed into the southern Indian Ocean, searchers are racing to locate the so-called black boxes before a battery-powered ping they emit fades away.
I'm not understanding this logic. I thought the black boxes were turned off, how are they going to get any "ping"?