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Route even searched their own territory? >> wow, that's a great question. we have completely lost sight of the northern arc. once the malaysian prime minister made the famous 10:00 p.m. announcement that they determined it was the south, we really stopped looking at the north all together. i heard that malaysia had asked kazakhstan if they could set up a search facility up there. i haven't heard back about it. so, great question. >> mary, question from dale. it says why not drop pinger in area to calibrate detected pings. we know the ocean can play tricks on sounds. should they put a pinger do...

Pinger can cause the frequency to change that much. i'm still confident it is there. we just have to search better and deeper somehow. >> richard, last night on the program you read some questions that family members put to authorities trying to get answers. a lot of them were sensible questions, basic questions that i was surprised authorities haven't released -- i'm not even talking about to the media but to family members. how likely is it to happen, questions like what sort of casing are the elts in, the electronic transmission transit mitters. >> absolutely, anderson. that's why the next ...

Up the arc. i understand that's maybe in the future. not knowing what went on up there, from what i do know i would have a hard time giving up without more harder look at what they may or may not have missed or should they make this bull's eye bigger. >> mary, to that point, if the satellite data is accurate and richard's data indicates it is and the pings were from the black boxes, the searchers are ve presumably close. >> they are certainly close. we have heard a lot of interesting things about the ocean and the sounds in the ocean and the effects of pingers, et cetera. there's a lot of thin...

Certain layers in the ocean, sounds can travel much farther than ordinary. so they would have time to literally put a pinger down and see how far it travels and how far they must expand the search. there are a lot of things they can do, not just refining the inmarsat data but expanding their knowledge of pingers in this part of the ocean. >> the australian chief said he expects ongoing data analysis by a team in kuala lumpur to result in further refinement of the search area within the next couple of weeks. how much more refined can they get? >> you know, i really don't see they could get much...

Wheel well of a jet in california and stumbles out into a hawaiian runway five hours and 2,300 miles later. how did he survive? that story tonight. and you have been tweeting us your flight 370 questions by the thousands. we have top aviation and security experts standing by to answer them. like this, could the pinger be buried in silt at the location they are now searching in? can the bluefin locate it in that case? i want to go right to cnn's reporters in the search zone. miguel marquez is in perth. hello to both of you. miguel, i understand there's been a change of today's search plans base...