show s currents and turbulence f the two floating objects spotted by satellite are part of the missing plane the water conditions could push them farther east and likely farther apart. some oceanographers estimates the objects, some of the strongest leads in the case, could be anywhere from a 15,000 square-mile area. that's roughly the size of belgium. below the water surface and even merckier picture. the seafloor sits more than 9,000 feet down, deeper than most submarines can go. the mid ocean ridge, rising from it, making the search even more difficult. >> the depth is a factor here. the terrain is a factor. describe what it would look like down there. >> like the rocky mountains. >> it's so challenging. and for so many people it's so hard to get, wrap your mind around what they are doing and how difficult this is. >> reporter: if the objects in the satellite images can be found, if they're from flight 370, if researchers can use the