that so far. and in any case, each detection sort of fills in a gap. fills in the box. and as they go back and forth in a very specific grid pattern they will start to build dots. and those dots will get tighter and tighter and you will get to a point where you can come to a very tight and close idea of where you would want to put that unmanned autonomous vehicle. and at that point you start to paint the ocean floor with sonar images. and if there is a wreckage there it will be quite obvious. >> now, miles what we see in australia is the larger map showing the search area, on the surface, the debris as it relates to where the pings were detected. on the close-up map, although it shows where the four pings were located and where they faded there is something missing from that map. what is missing from what the australian authorities are telling us? >> yeah, the thing about that map that is a little confusing