second for about 13 minutes. let s talk more about the hms echo. we know it is designed to chart the sea floor with state-of-the-art sonar capability. i want to show you two examples of the images the ship has generated in past missions. these images from july of last year when echo made surries of 20 shipwrecks on the seabed near libya. you re looking at what it s capable of doing. on this particular mission near that chinese ship, with we know that echo would be using two principle pieces of technology. the first one would be passive sonar. the second one would be active sonar. so the passive sonar simply sits in the ocean and it listens. it s listening possibly for the pinging sound. the active sonar, what that would do, would feed out energy and waits for a return response. that would help the vessel in locating debris.
british hms echo are trying to confirm pings the chinese briefly detected friday and saturday. australian officials say it s unlikely to be from the same source. it s quite possible for sound to travel great distances, but be very difficult to hear near the surface of the ocean, for instance. reporter: all of the activity is happening right along this ark. where a partial satellite connection placed the plane at 8:19 a.m. the day it disappeared. the australians believe it s the most likely place the plane went do down. also emerging, new details about the plane s flight path. an official tells cnn after it makes that left turn, based on radar data, it skirts indonesia, which you re seeing there. that just suggests or raises the question, was the person in the cockpit trying to avoid radar? we may be one step closer to finding out if the new signals detected are truly from the black boxes, but you just had
thank you very much. i want to bring in our experts now. cnn aviation analyst mary schiavo, colleen keller, and cnn aviation correspondent richard quest and les abin. and audio expert paul ginsburg joins me now. mary, what do you make of this unannounced press briefing? well, i would like to be optimistic and say that since they deployed the echo up to where the chinese had picked up the pings on two different days that they have an update for us and say they have put their equipment in the water and they re listening. and either they heard something or they haven t. and as the previous guest mentioned, it would be nice to hear what the shield is doing. i mean, surely they know that the world is waiting for the next ping. that s what i hope we hear about. if they ve got any new news to tell us about the sounds from
the united states. to update us on the search. we understood, we heard from him last evening at midnight. it was midnight that he came on, right? we heard from him last evening saying that the echo had heard something, that the ocean shield possibly had heard something. there were three different events, one by a chinese ship and one by the australian ship. and that they were possibly going to move the australian ship in the vicinity where the chinese ship had heard the ping earlier. so the information we have now is that. and you said they also had some of the satellite coordinates in order to update the search area, to hone in on the specific search area. so now we re hearing, we re going to hear from him again, not exactly sure what he is going to say. but believe it or not, the plane crashes equal future safety and security in improvements. and when that happens, i guess it does. because everyone looks at what they can improve.
for the proven relief of the purple pill. and that relief could be in your hand. for many, nexium helps relieve heartburn symptoms from acid reflux disease. find out how you can save at purplepill.com. there is risk of bone fracture and low magnesium levels. side effects may include headache, abdominal pain, and diarrhea if you have persistent diarrhea, contact your doctor right away. other serious stomach conditions may exi. avoid if you te clopidogrel. for many, relief is at hand. ask your doctor abouxium. live from america s news hq, i m harris falkner. there s an encouraging lead in the search for flight 370. a third pulse signal has been detected that could be coming from the plane s black boxes deep in the indian ocean. hms echo is in the area to check it out. two other sounds were picked up by chinese ships in other areas last week. the sounds could be triggered by whales or noise from other ships