Page 27 - Salinity News Today : Breaking News, Live Updates & Top Stories | Vimarsana

The salinity and the surface temperature. you might get a difference in temperature between a lower layer and an upper layer and a difference in salinity, in density. and this would affect the path of sound waves. and so the two ping signals could very well be coming from a signal source. and with all the errors adding up, they seem to be very far apart. but if you're going to look some place, this is sure a very good start. >> yeah. jeff, we are learning tonight that the pings detected by the "ocean shield," as bill nye was just referencing, were actually at 33.3, where he said you may get a ...

Would you recommend that as well? >> well, if we have the resources. but as an engineer, i would say, if you have this datum from a couple of years ago where the air france pinger changed frequencies at great depth, it's likely this one did too. and with all the errors, it's very reasonable the pinger would change frequency like this. but with that said, if we're right at the limit of the batteries, 32 days, and you've heard nothing, maybe that last little bit you heard was the last little bit that this device could produce at this depth. and also, along with the errors introduced by the diffe...

Layers in the ocean that form with different temperatures and salinity. and this is all -- we're all speculating. but it is possible that it's -- that that's the last you're going to hear from it. >> michael kay, remember last night, we were talking to, you know, one of the guys out on on the "uss blue ridge," and you were talking about triangulating. how do you figure out the location? what do you do? do you drop markers or what have you? so if the batteries are gone, it does give them, you know, an area which to search, but as you heard angus houston say, it's a very big area, and there are,...

What adds to the mystery is the terrain. >> you have valleys. you have gullies. you have mountain ranges. it's very much an area as it will miami mic what we have top side. >> reporter: they're trying to find acoustic pings, the black box. in air sound travels in a straight line, but it's not like that in the sea. it can angle and bend up to 90 degrees. that means you can't be exactly sure where the sound is coming from. >> acoustic energy sound through the water is greatly affected by temperature, pressure and salinity. >> reporter: if they're able to hear another ping and fix the position, i...

From. >> acoustic energy, sound through the water, is greatly affected by time, pressure, and salinity. >> reporter: if "ocean shield" hear hears another ping and is able to fix the position, it will put blue fin 21 into the water and attempt to find wreckage on the sea floor. if wreckage is located, one aspect may work in investigators' favor. very low temperatures. >> cold temperatures does preserve things better than a shallower, warm temperatures. >> reporter: the search continues. >> and what i would like to see now is for us to find some wreckage. because that will basically help solve t...