Battery Pingers News Today : Breaking News, Live Updates & Top Stories | Vimarsana

This search to a new phase? >> reporter: no timetable given at the moment. we know that the australian vessel and the british vessel continuing to comb the waters trying to detect any pings. efforts by air, as well. surveillance planes overhead trying to detect signals from the buoys and continuing to do that as long as they believe there's any possibility that those black box battery pingers have yet to expire and no timetable for that. we are some 37 days since this plane went missing. the black box batteries have an operational life of some 30 days and can't be all that far off from them de...

This is what it sounds like. do you hear that? that's the electronic ping, it's not really audible, human ears can't pick it up. of course there's a catch to this. >> battery pingers may have only days or hours left. which apparently is a game-changer once that happens. if they can find something in the next 24 to 48 hours. joining us from london, alastair is here with us. >> good to have you here. a senior u.s. official tells cnn, actually, our pamela brown, that investigators have discovered that they programmed alternate routes and searched what to do in flight emergencies, and they called ...