in reality this plane would be a speck up here, very, very small. that search zone down there is still too, too big. this kind of debris can help them narrow it down so something much more manageable and start calculating the drift patterns to see if it came from hundreds or maybe even a thousand miles away. >> so, the currents, let's talk how extreme they can. when i heard about the plane flying over the space and coming back doing a swoop through and the object is gone. it does seem to indicate things move very quickly. >> yeah they certainly can. this is the collision points between the indian ocean and orchestrate tick sea. so, if we bring in this global view from the national oceanic and atmospheric administration these are time lapses of current flows around the world. we go past australia and this is taking us into the very area we're talking about here.