CNN CNN Spotlight March 22, 2014 23:52:00
Detailed imaging of the "titanic." >> the smaller ones go down to 5,000 feet. the next classes are much more expensive, larger device, 15 by 25 feet, very large. it adds a lot of batty capability, a lot of hydraulics capability. >> reporter: the autonomous underwater vehicles, auvs, can go as deep as 20,000 feet, sending acoustic pulses to the sea floor to find debris. then maps are drawn to guide search teams. then even find things up to 300 feet under the sea floor. the search zone needs to be narrowed down first. this auv can only search eight square miles a day. it would take four days to ...