for a very selfish reason i don t want the loch ness mystery or interest in loch ness itself to diminish it ll be hard for nessy to hide from this high tech hunt, launching drones overhead, scouring the surface, while also listening below. we are dropping an under water microphone 60 feet down below the depth. we ll be doing some audio testing to find out what noises exist down there. reporter: they are using sonar to map the lake, which has a depth of nearly 800 feet the maximum depth here, this is the deepest part but it is a huge area. reporter: somewhere in all of this dark water there is a monster lurking but it is up to us to find it or find her. ken gerhart traveled from the u.s. to hunt. he researchers animals on the fringes of known reality.
Boxes may explain what led to this disaster. but how will searchers look for the plane under water? first, they will likely listen for it. all commercial airplanes are required to carry pingers, underwater locater beacons attached to the black boxes. they emit a ping once a second. it s really simplified an under water microphone. this is the type of device they ll tow behind the vessel and listen for that pinger locater. how far can it hear? about five miles. unlike the extreme depths of nearly three miles in the indian ocean where flight 370 disappeared, the java only runs 80 to 100 feet deep. while it s easier to operate the hydro phones at this depth, he
After the plane vanished. sources also tell us that investigators are confident it was the flight s captain who radioed in that last message and there was no sign of stress or possible third party when he said good night malaysian flight 370. this morning search crews discover a possible new signal, raising hopes that they may be closing in on the flight s so-called black boxes which could explain exactly what happened. let s begin with that new signal. cnn s will ripley is in perth, australia. good morning, will. reporter: good morning, carol. we know that data analysis is happening as we speak on that fifth possible ping that was detected, not by that towed pinger locater. this was actually detected by what s called the sonar bu es. the australian military was dropping these into the ocean. it has an under water microphone that goes down about 1,000 feet. it listens as well.
You heard can t matthews say earlier as long as there is hope that the black box pingers are still picking, they are paying attention to the special locaters. reporter: this high-tech listening device can glide along near the bottom of the sea at about a thousand feet from the ocean floor. it is a u.s. navy hydrophone or under water microphone called a towed pinger locater, search teams are counting on it to find the pings located directly on the black box. but time is running out for the pinger s battery life. what they re trying to do is get ears in the water while the pinger is still going. reporter: this is the sound they re listening for. this is 30 inches long and weighs just 70 pounds. it is towed behind the ships that operate it, in this case, the ocean shield and generally
The emergency the pilots were placing and the inconsistent information they were getting. there was a great deal of information readily available. here we don t know whether the information was unavailable because it was disabled or turned off or due to electrical failure or some other cost. we just don t have that kind of information. let s talk about the apparatus or assets out there. right now there is incredible state-of-the-art technology being used searching for sonic transmissions and a giant under water microphone will listen for the pings and an under water robot will scour the ocean bed. obviously it is a lot of equipment. you said they could use more but still there is it is a glass half full i would imagine. you are absolutely right. this is the most equipmentt that we have actually seen employed