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By hoping to identify either hear the ping or first get a debris field. if we get a debris field then we are likely to get a ping, maybe. assuming there isn't a whole lot of drift. once we get a drift blue ping 21 to go look for it? >> again. if we don't hear that ping we will still go see blue ping 21 to map that bottom. >> thank you. >> joining us is hank whitmore and underwater search expert colleen keller. let me go first to you, hank. the new information tonight about the words coming out of that cockpit. i don't know, is it profoundly different although i think there is probably a lot of...

By hoping to identify either hear the ping or first get a debris field. if we get a debris field then we are likely to get a ping, maybe. assuming there isn't a whole lot of drift. once we get a drift blue ping 21 to go look for it? >> again. if we don't hear that ping we will still go see blue ping 21 to map that bottom. >> thank you. >> joining us is hank whitmore and underwater search expert colleen keller. let me go first to you, hank. the new information tonight about the words coming out of that cockpit. i don't know, is it profoundly different although i think there is probably a lot of...

Speck but might get another 10 days out of them. as the batteries die off the signal becomes weaker and you have to get closer to detect it so it's a tradeoff. >> how about, colleen, i assume the depth of the water makes a difference. the deeper it is the farther away it is to send out the signal. how about the temperature of the water? does that make any difference at all in terms of battery life and in locating this? >> the batteries are designed to be in a wide range of temperatures. i don't think that would have such a significant factor and the temperature of the water would effect maybe ...