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It would be at the end of the life span if the batteries were refreshed. that refuels my cynicism. yes, this information is preemptive. it should be treated with extreme caution. it also places the air chief marshall host and the jcc in a difficult position. if i was the chief, i would want to release corroborated evidence that links what we found to mh-370. i would not be prepared to go any further until we have that for the families sake. if we can corroborate the pulse, 37.5 kilohertz, i would want the submersibles down there and the robots to physical check out the serial number on the black box to make sure it was linked to 370 before i came out and told the world we had found something. greg stone, you are the ....
announcer: this is cnn breaking news. and the breaking news at this hour, if you are just joining us here in the u.s. or the world, the chinese state news agency xinhua reported the patrol ship is looking for the wreckage there. the ship haixun has detected the pulse signal of 37.5 kilohertz per second. that is the identical frequency of a pinger on a flight data recorder. it has not yet been confirmed that the frequency is from a flight data recorder, but of course, they are flooding this area with resources. in fact, i m just getting word. there has been some questions about, you know, the chinese news agency xinhua and what they knew and what they didn t. i m getting word there is a ....
David soucie, how does this work? explain what you have here. we have a duchesne tester, and inside we have that s the pinger. $750 unit. doesn t look very dramatic. and that would believe in the so-called black box? yes. so there s two of them in here. every 1,000 hours, this is removed and rebolted back in and replaced. so what we have is the pinger includes the battery and the signal transdeucer. so if you look at this end, i don t know if you can see that, but there s a plastic lip that separates the case, which is the grounded area, from this little electrode in the middle. what happens when you put it in the water? what we have here is a tester. it s 37.5 killohertz. we have this device here, which i ll tune in. there s a bunch of different ....
It is towed from a ship, very slowly, less than 10 miles per hour. looks leak like a fin, weighs 70 pounds. this can extend to 20,000 feet below the surface. it s towed very slowly, as we said and has to be two-thirds of the ocean depth so that it does not hit obstacles. paul nelson, the project manager for phoenix international, which did he deploys this device, explained it once it picks up a signal. this is a towed pinger locater, this gets pulled behind vessel opportunity and detects the ping or chirp of this pinger. this is attached to the black boxes on an airplane. there are two of these on the two black boxes. so this unit will get pulled through the ocean, and then it listens to a tiny little chirp at 37.5 kilohertz frequency. reporter: now from there, wolf, they have people looking at the vessel towing it, looking at a reading of it in a graphic readout and also listening, for ....
Vegetation, other types of things, cliffs, other topology features underwater that could mask that signal, but in ideal conditions, two nautical miles, maybe 2.5 nautical miles. what are the tools being used to locate it? there are several different types of locators mainly around the microphone or hydrophone tuned to the specific frequency, which is 37.5 kill herohertz an listening for the one ping every second to identify and locate the devices. if the battery is to go out, is there any other way in which to retrieve a flight data recorder? you d have to visually spot them in the debris field. that s why they re painted that bright orange color. i know we call them black boxes but they re actually a bright flooruorescent orange. are we talking about the battery when we say they are ....