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Operation which now covers some 58,000 square kilometers. that is about 22,000 square miles. >> total of four suspected segales hasegal segal -- signals have been picked up in line with the estimated flight path. >> right now ships and aircraft are working the area of course looking for evidence of debris. >> all right, lets get the latest now on the search. our correspondent joins us live from perth, australia, aaron, after 3:00 in the afternoon in perth. we havent had any update on search oper...

Pinger locater. trying to detect signals. the more pings it gets. the more narrow a potential search field. making it even easier for an underwater physical search for wreckage to take place. it is worth noting. yesterday, angus houston the man responsible for coordinating the operation said he did not want any other vessels in that area while the sound search was going on any other vessels in the area could potentially interfere with the detection of the signals. rosemary. >> all right. our rep...

Operation. she said that it is moving because that, at the moment, is the most promising lead. she also noted everyone pretty much has discounted the detections of the chinese vessel made over the weekend. as for what exactly it is going to be doing when it arrives, she said that is unclear. she said at the moment the "ocean shield" is taking the lead in this operation. worth noting of course that the "hms echo" is equipped with sophisticated sound-detecting equipment and technology that would e...