hopefully of numerous pieces of debris, and then from there we have our oceanography team ready to reverse engineer the environmentals. so they will do a reverse plot going back 18 days, taking into account the current, the wind, the sea state. and then they will from the last confirmation of debris they will work backwards to create this starting point of where the plane may have crash landed. of course, that's when we'll get our towed fingpinger locater on scene. >> the towed pinger locater, where is it at this point? >> it's in perth right now. and the critical thing to know is, the search area right now is way too big still. it will not be effective to use that when you don't have a good datum. it needs to be towed very