CNN Anderson Cooper 360 March 27, 2014 00:19:00
Say pingers, these are in the flight data records. this is what alerts people to the flight data recorders. >> it's the sound. >> are they test before being put into the data recorders and boarded on the aircraft? >> they're tested in that they have a machine that will test them to see if they ping. there's no way to check the load of the battery. >> really? david gallo, if the pingers have failed, or obviously limit a life span, what's then the best way to go about finding the black boxes? >> good old systematic mapping of the sea floor. line by line, step-by-step. it takes a bit longer but t...
Source: archive.org