CNN CNN Newsroom March 25, 2014 19:06:00
The bottom of the ocean. so if you're in the southern indian ocean, you have to get censors like this all the way down near the bottom of the ocean to generate a high resolution map. >> reporter: in this case, how deep are we? >> we're in 40 feet of water right now and we're map prosecuting the veing from the vessel. you have to get this much further down. >> reporter: and you can't do it fast. you're talking about going through miles and miles of sea floor. >> you have to build this map up. it's very complex to get it down near the bottom of the ocean. you have to cover small areas that you b...
Source: archive.org