actually located specifically where the black box is, then they will send down a remotely operated vehicle which has arms and which they will be able to pick it up, put it in a basket and bring it to the surface. >> i want to bring in eric, a physical oceanographer at the university of new south wales. eric, many of us envision the ocean as a crystal clear blue water but at these depths what is the ocean really like? >> well, it is pitch black at these depths. it is because ocean water doesn't let light through. if you go slightly below the surface, sure, there's a little bit of light. anyone who has been diving knows the further down you go the less the light goes through. as soon as you get 300 feet or so below the surface, nothing, this is darkness only. >> they said that silt sediment was going to be a problem. can you explain the 0 ocean ooze or sediment to me and our