that when this ping starts radiating out it hits the temperature layer and then it can come back down. so you've got these things. so now you're dragging your pinger through here, the tpl, and from here to here, maybe seven minutes. from here to here, maybe it's five minutes. >> i see. >> okay. >> okay. >> so you may not necessarily be -- i got a lot of lines going up there. >> you do. you're going crazy. i don't know what to do with you. let me ask you about, how does the fifth ping, the fifth ping that they do say was a false start. how does that play into this? >> okay. >> is that a huge setback? do we learn anything from it? >> actually yes. here's how. remember all this is all about ruling out, not necessarily ruling in. >> okay. >> okay. >> okay. >> you're trying to figure out where it's not. >> testing theories and finding out where it's not maybe. >> exactly. exactly. so now this airplane flies over here and they drop these sonobuoys. 84 of them, i think it is, 84. they're all over the place. give me a different color.