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Australians might want to bring about requesting if they're going to continue to search the surface for debris. >> that could take place smul t simultaneous, allen? >> absolutely. the surface debris and as everybody else mentioned, we are talking about the if you will listening to the pingers. i suspect the "echo" a submarine rescue and recovery vessel will probably start matchi inmapping location. >> miles, what do you expect this week we are likely to see in some sort of turning point of the investigation? we are entering week five. >> i think what you will see this week is the decision will...

Further than that. it's 160 decibels which that's as loud as a gunshot and ten times as much as the ocean requires to put hearing protection on for a human being. granted, this is underwater but the fact is, it's a very loud sound. simulations we have heard are just that, simulations. at 36.5 or 37.5 kilohertz, that's as high as a dog whistle and encouraged with it. confident that's where the sound came from. >> allen, in your view, now's the time to bring in new air assets, air force assets made available. to what degree? >> if they continue to look for the surface debris, there's limitations...

Share with you. by 39% they're saying to more than 22,000 square miles. just yesterday, remember, that area had shrunk to 16,000 square miles, which was the smallest area thus far. >> today, 12 planes, 14 ships are scouring the southern indian ocean. this as you know is a dire ater attempt to find the black boxes, any part of this plane. >> joining us to discuss the latest, simon with the national oceanic center. >> and mary, a senior profiler. simon, starting with you, what do you make of this expanded search area? >> please be careful, the expanded area is the search area at the surface and ...

Of questions to know in a month or two when we find it on the ocean bottom. it is important to remember there's three different searches going on. the first is surface debris. it seems to me the australians are trying to move the area around to check places they haven't looked before. the second search for the pinger locaters. that's been successful. don't downplay the fact of solid contact. maybe within a week, the very meticulous search of the ocean bottom. >> you are not discouraged there isn't a redetection of that pinger song, last sound, in five days? >> no. again, when you look at the m...

Of years ago. it crashed in january. they got the black boxes in august. the world record was in the indian ocean, 16,000 feet. they got those in two days. you never know how long the next step is going to take. >> simon, does it bother you they haven't seen one piece of debris up to this point? >> no, not particularly. i mean, they're looking for surface debris. let's face t over the past month, they've been chasing rainbows. they've been looking in the wrong place. it's only in the last week that the search area is focused on this far north site. far further north than anything before. if we...