bottom? the reason they re holding off and continuing to listen as much as possible is because you can cover more ground when using this locater. if they do detect one or two more, it will help them zero in that much more the possible location of where they believe the wreckage is. because once you get the submersible down there, it s a very slow process. 20 hours just to do one pass. it s six times slower than the pinger locater. so it s something they want to make sure they could not hear another ping before the deploy the next phase of the search. well, will ripley in perth for us. thank you very much. your mind is boggled in how many participate in the vessels. but there are many specialists trying to help. the full pings detected under water this past week, they were picked up by a team of sonar teches. yes, this is a considerable undertaking. they have been working long hours aboard the australian ship oceanshield.
reporter: we re hanging on what they re hearing. the hopes of finding the black boxes from flight 370 rests on a few technicians hunkered down inside a control bunker on the oceanshield. they re on all the time. what they do is so important to us. reporter: we went behind the scenes at phoenix international, the company that made the pinger locater that s scouring the area. phoenix has nine people on the oceanshield. tasked looking at monitors listening, listening some more. you ll sit for days listening to nothing. then you might hear a chirp. but you don t hear another one. so until you can duplicate it and run it back at different angles, only until then are you positive you have it. reporter: and even then, experts say, sound in the ocean can play so many tricks on your ears. several people can look at a signal and see different things.
geoffry. will that lead this investigation? there s two elements to this. which probably haven t the two elements to this now. if we get no more pings, then we have to go to the bluefin-21 which has been talked about. however, there s one other asset that is working in this area which is the hms echo. that s in the pinger search zone with our australian ocean shield which is towing the pinger locater. the hms echo is using echoes off the bottom. the bottom at this area is silt. they re hoping a large metal object like a big large airplane will give them a different sort of return, a more positive return. and that may shorten dramatically the search. because the hms echo unlike
the hunt for serial shooter intensifying as police confirm 12 of the highway shootings there are connected. the reward for any possible tips just raised to $10,000. the shootings began on march the 8th. three people were hit and wounded by the bullets. all are expected to be okay. police also reviewing seven additional cases that could be related. searchers race to find the missing malaysian airlines jet after no new underwater signals have been heard. today, 10 aircraft and 14 ships are searching the southern indian ocean. the australian ship ocean shield continues to sweep the waters with a pinger locater hoping to pick up signals from the plane s dying black box. trying to locate anything four and a half kilometers beneath the surface of the ocean, about a thousand kilometers from land is a massive, massive tank. well, once the underwater search area is narrowed a
australian war ship went down, the hms sidney, not a trace. without a trace. without a trace. and this had 600 men on board, in the battle of the german raiders, there was a battle actually going on off the coast. took them some 20 years to find it? it was just found a couple of years ago. the only thing that was found was a single raft found on christmas island, way to the north, thousands of miles north, many years later. that is incredible, an entire ship going down, and one raft yeah, and they were looking very hard for that, the australian air force was looking for that. for a long time we wondered how do you lose a war ship, without a life preserver and a bit of wreckage on this thing. are the buoys as effective as the pinger locater? because the sonobuoys only go