CNN CNN Newsroom March 12, 2014 13:29:00
In the digital age when we've got gps and our cell phones in cars, how do you lose an airplane? malaysia airlines flight 370 also had gps and a trans ponder sending signals. the jet was tracked by radar but now that we know the transponder signal was not operational when the plane disappeared -- >> it's not going to do anything anymore. once it's gone off, it's not going to come back on. from the gps standpoint, all that is is mainly for the aircraft to know where it is, for the pilots to know where they are. there's not something inherent in the gps that says, here i am over here. >> reporter...
Source: archive.org