>> in terms of the time line now, david gallo, what are we looking for? obviously we know they're continuing to search for any other pings. maximize any opportunity to narrow down this potential field. what sort of -- and angus houston saying it is likely in very short order that they're going to start to put the autonomous underwater vehicles in. he says he doesn't believe it is that far off from the time they're going to do that. table are we looking at? >> it depends on what the goals are if they define in detail, it could be anywhere from a week to a month in mapping. but i suspect it would go by quicker than that before they first start to recognize if the aircraft is back there. it could go by much quicker than that. i think in the next week's time you're going to see a vehicle in the water. maybe even three days from now, and then we'll go from there.