Detailed text transcripts for TV channel - MSNBC - 20140321:10:13:00
They have an ultrasonic pulse or pinging and the pulse is picked up by sonar or other listening devices on ships passing over and even as far away as 5 to 10 miles but the batteries stand out to run out in 18 days or a little longer so time is critical. aviation expert bill waldon. >> it's absolutely essential that we find the flight recorders. the information they are going to have on them is probably the only way that we're ultimately going to be able to really solve this mystery. >> so it's really the flight data recorders and the other avenues as greg mentioned, the investigation into the ...
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