using three vehicles at the time. that s right. can you extrapolate to this. if they are in the right area and only have one vehicle that we re not looking at six weeks or six months? it could be to cover the whole area. we re not looking for just an aircraft but maybe a debris field it could be something as simple as a plastic cup. it may go by must faster. do you think there is debris on the surface of the ocean? i have to come back to the hmas sydney that sank in world war ii. it was gone without a trace. so mary, as an attorney for victims of transportation accidents and their families what is an open ended and unresolved investigation mean for litigation? they would be litigating under the montreal treaty and it would be against the airline.
to have gone down. the sadness onboard, to see those images is going to be matched again if that occurs in this case. it looks like it actually sank upright. michael mccarthy was on the team that found the sydney after more than 25 years of searching. he sees eerie similarities in the search for flight 370. you have an enormous area where it could be or may not be. you have a similar depth of water. you have similar emotions. reporter: but the search today has the advantage of technology. if satellite images and search planes can find debris from the plane in time, the flight data recorder should be sending out a signal. but the search for hmas sydney shows that even without that signal, wrecks can still be found using sonar scans. it just takes time. mccarthy describes the process. that then just mows the lawn back and forward until you finally find the signal, which tells you there we have our
hearing. criminal at worst. and you have this new wall street journal report, says flawed coordination was the reason search teams were looking in the wrong part of the southern indian ocean for days. hundreds of lives taken somewhere in the depths of hundreds of thousands of miles of ocean. and not only speaking of flight 370 here. but also the voyage of the hmas sydney. it was a vessel that also disappeared off of australia s west coast. and cnn actually spoke to a man who helped find the sydney and he help can t help but see these eerie similarities between the ship and the plane. reporter: these are the first images of the sydney more than 60 years after sinking in battle with all lost at sea. this was taken in 2008 off the coast of western australia, the same waters from malaysia airlines flight 370 is believed