Page 24 - Pinger News Today

The "ocean shield" and where it went, making the turns, going up this way and coming back down. you can see theyre attempting to make a grid along this arc. you saw the arc before. >> yeah. >> that was in here before. now you can see that youre starting to pick up these pings. you have a two-hour ping and few others. some are outside, way far away. >> this seems scattered to the uninitiated eye. there is a method to this? >> absolutely, there is. you can see theyre starting to come together here...

It just doesnt go down inside. the small things like the pinger boxes and black boxes, they may be down inside there. the two ways to search once youre down there is visually by using cameras or by sonar. sonar is fantastic for this because it can see down into the silt. >> visually is where you would have a problem. sonar, what the bluefin offers, would not be a problem. >> right. it would identify any hard objects and which ones are manmade objects versus rocks at that level. you will start at...

The search area narrowing yet again. day 34 since the boeing triple 7 vanished with 239 souls on board, yet only the start of day two, in the underwater search in what experts say is most certainly a black box pinger. the officials are certain they will find not only the black box but the plane, they are becoming more real. well explore them tonight. first the very latest from michael holmes at search headquarters in western australia, so what do we know about the latest search efforts under way...

Its not an accurate location like its right underneath me or over here because its not sensing the strength of the signal. its just saying theres a signal here. >> what do they do with this going forward? i was reading that overnight they had put in some 84 of these in just this one kind of -- in this one location. what are they going to take from this information? how does it help in the effort to narrow the search field? >> what its going to do mostly, the ofinformation is going to s here is w...

World in dubai on the way down and still be only a fraction of the way to where the plane wreckage might be resting. keep plunging, and you have entered a place sunlight cant reach. the pinger located is being towed well below that. 4600 feet below the surface. marine biologist paula carlson says aet at these depths marine life is unlike anything most people have seen. >> the deeper you go you find less and less. they have to be cold tolerant and might not even have eyes. they might be blind bec...

But its worth saying that the "hms echo" has sophisticated sound-detecting equipment, but its also capable of mapping the sea floor. officials here in australia are not commenting on this development in the search at the moment, but not saying whether or not this might signal perhaps a new stage of this search. for all we know, as you say, the "ocean shield" is currently out there, equipped with that american towed pinger locator, scouring the waters, trying to detect more signals from this blac...

If you go all the way down to the deep ocean where this pinger is, what were talking about is the deep area at the end of the long slope that theyre dealing with in this area. it is more than three miles deep. over here, more than one and a half miles. this is generally believed to be around the two and a half mile deep zone. that is plenty deep for all the equipment we have that might reach it. if you go below that youre relying almost entirely on robots. and placement along the ridge, jake, ma...

Its something that was made by man, and i really have no idea what it would be other than an acoustic beacon. >> reporter: searchers who are towing that pinger locator behind the australian ship "the ocean shield" have detected it four times -- first two on saturday. as time has passed, they are noticing that the signals picked up tuesday are not as strong as who they heard on saturday. >> that means probably were either a long way away from it, or in my view, more likely, the batteries are star...

Understanding is because of the way sound can refract under water, that is why youre getting these locations. >> when you look at the graphic, i think you can see where the ship was or the pinker was -- pinger was, it doesnt mean that is where the plane was -- >> why is it spread out? because sound bounces around on the water? >> exactly, sound bounces around, and depending on where the tpl is, the sound, it depends on where they go, with the layers and the topography. >> that is why theyre gett...

Ocean shield is towing this pinger locater searching for flight night. my experts are back to answer your questions for you. this tweet is for david. it says will the extreme cold of the deep ocean help pinger batteries last longer? any mathematical estimates from your experts? >> i dont think it will. it is supposed to go 30 days. it has a buffer but that includes the testing at cold, hot, whatever temperatures, but not hot hot temperatures, of course. but normal operating temperatures. the col...