Officials tell CNN there have been no confirmed acoustic detections over the past 24 hours.
Black Box Pinger Manufacturer: Flight 370's black box batteries has 40 days
That's significant because at most, the black boxes have a couple more days of battery life left in them, according to he largest manufacturer of black box pingers.
The technology that will search underwater for the wreckage - like the Bluefin 21 - is now of even greater importance.
Could jet's descent have shaped debris field?
CNN'S Rosa Flores has a demonstration on the underwater technology that will locate the missing wreckage.
Hi,
How about asking the cell phone experts if the fact the tower attempted to connect with the cellphone, whether the experts could tell if he was trying to use the gps system on the phone. Thanks,
question regarding the missing flight 370: if the plane landed on the water and then sank, wouldn't it have been destroyed by underwater pressure and therefore debris would be visible on the water's surface?