CNN Piers Morgan Live March 26, 2014 04:18:00
Up a 3d map of the sea floor. and the information is used to generate the map. >> let's take a look at the hide row phone data, which is showing what you're hearing. >> well, you could listen to the headphones, but this is a spectrum view. showing the frequencies in the ocean. >> and over here is sonar. just showing us what's on the bottom, right? >> exactly. emitting the sound, it comes back and draws a 3d image of what's on the sea floor. so, this is how they build up a map. >> and you can see this
Source: archive.org