CNN New Day April 10, 2014 10:47:00
It just doesn't go down inside. the small things like the pinger boxes and black boxes, they may be down inside there. the two ways to search once you're down there is visually by using cameras or by sonar. sonar is fantastic for this because it can see down into the silt. >> visually is where you would have a problem. sonar, what the bluefin offers, would not be a problem. >> right. it would identify any hard objects and which ones are manmade objects versus rocks at that level. you will start at a pretty high level which gives you a wider swath of sonar. then once you say, hey, there's somet...
Source: archive.org