Toad Pinger News Today

>> so, here is the bottom line -- if the blue fin 21 comes up empty next week, it will be time for all search crews hunting for flight 370 to stop, regroup and reconsider the whole search operation may need a reboot at that stage. so, i want to bring in aaron mclaughlin who is at the search base in perth, australia. as we hear this news, is it good news, is it that they have greatgreat er confidence that they are close to finding it or if they dont find it in the next week or so theyre looking i...

>> reporter: weve been talking a lot about the high-tech devices that have been turned loose to listen for pings off the ocean floor. like the toad pinger locater and theres been word of the buoys being dropped out there. but any device listening in the deep ocean faces unique challenges because sound does very strange things traveling through all of that deep water. heres just one of the challenges out there. theres a layer about a half mile down in the water here that is a naturally occurring ...

Area until they are 100% sure the black box batteries are dead and there is zero chance a new signal or lead is heard. >> the biggest concern is time because there is a finite amount of time they will be transmitting and we are trying to maximize the use of the toad pinger to detect while we can. >> the was talk they already ran out of batteries since there were three days of quite under water. now officials are optimistic the batteries have a little juice >> lets hope. especially for the search...

Equipment used to locate the pings. if the box goes dead, they will switch to a sonar search for identify what is consistent in size and shape with flight mh370 black boxs. >> when the acousting beacons are no longer emitting we will switch to a sonar search for with a shorter detection range and tough processes. and whether we locate it or not with the toad pinger the area we are in will be a high area we will conduct the sonar search. >> reporter: that is the last step, but there is a willingn...

Very choppy seas. but the air is going to cover by far the biggest area and then a visual conformation. >> and that is when we can put the toad pinger in the water. best of luck for your team. we are rooting for you guys and hope for good news soon. >> oscar pistorius could soon take the stand. prosecutors have rested and the defense is going to present his case. why might here his version of what happened the night he shot his girlfriend.

Without a confirmed piece of debris or a confirmed pinpointed location, search teams want to be ready for that, if and when it happens. they want to be ready to find the crucial black box and the pinger, that crucial piece of equipment you just mentioned that will help them do that. it has just arrived in the region. >> the u.s. navy has only two of these high-tech listening devices and one of them is now head together indian ocean to help find the missing plane. it is called a toad pinger locat...

Hour, over the course of 16, 17 days were still talking hundreds of miles. so thats what -- we need to get the first planes out there to get the best location we can. so then our toad pinger locater c can nnt can listen in the right spot. >> commander marks, thanks for taking the time to talk to us. thank you. for more now on the hydrophones, essentially water microphones, stephanie elam joins us from a boat off the pacific coast off santa barbara, california. stephanie? >> reporter: aernderso...

Link the debris to mh-370. >> special equipment from the united states. in australia now racing to the search sight. >> a toad pinger and its mission, to find the black box before the pingers stop. >> all of it in the size of denver, colorado. are we any closer to finding flight 370. youre live in the cnn "newsroom." . good morning. im carol costello. thank you so much for joining me this morning. breaking news and a significant headline in the search for flight 370. a very large possible debr...