VIDEO-How a black box pinger works | National News - Home

Ships in the Indian Ocean are trying to zero in on a signal they believe could be from missing Malaysia Airlines Flight 370's flight data recorder. Dukane-Seacom, the company that makes many of the pingers on airline black boxes, opened its doors for an inside look at how these pingers work.

http://m.wlky.com/national-news/how-a-black-box-pinger-works/25369708