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
yeah, what they ll do is they ll back-draft on any of the movements of the ocean itself and the direction of the wind. you notice that the debris is south and a little bit east of where they last got a fix on the aircraft. that could have either been from the aircraft turning around or from a stall or it could be just from drift. they ll back-draft up to where that came from, try to get all the surface debris collected first. then at that point start focusing on looking for the beepers themselves, the pingers, the underwater locater beacons themselves to find the black boxes,. subsequent to that is when they would start looking for the substantial debris and deciding whether that aircraft has to come back up out of the water or not. and we know that this area of the ocean of the java sea is much more shallow than, for instance, the south indian ocean. it s a matter of hundreds of thousands of feet. it will be important for
debris found in the search area does look pretty convincing by the sound of it. and certainly the australian naval vessel is very close to that site and will be able to make contact with it and bring it on to the deck of their boat when they find it. roger, thank you, sir. thank you. and time is running out for those batteries in those black boxes. the boxes hold what may be the only clues to what really happened on board flight 370. the u.s. believing believing to the ocean is sending two pieces of equipment to the hunt. colleen joins us. what is it that the u.s. is sending it try to recover the black box? the u.s. is sending means to do both passive and active detection of these underwater locater beacons. the passive detection is a fish or hydro phone that we drag through the water that can detect the beacon s ping
area does look pretty convincing by the sound of it. and certainly the australian naval vessel is very close to that site and will be able to make contact with it and bring it on to the deck of their boat when they find it. roger, thank you, sir. thank you. and time is running out for those batteries in those black boxes. the boxes hold what may be the only clues to what really happened on board flight 370. the u.s. believing believing to the ocean is sending two pieces of equipment to the hunt. colleen joins us. what is it that the u.s. is sending it try to recover the black box? the u.s. is sending means to do both passive and active detection of these underwater locater beacons. the passive detection is a fish or hydro phone that we drag through the water that can detect the beacon s ping