that is a positive change, but the search so far has turned up nothing. listen to this update from the australian maritime boss, john young. >> although the search area is much smaller than we started with, it nonetheless is a big area when you're looking out the window and trying to see something by eye. so, we may have to do this a few times to be confident about the coverage of that search area. >> let's go live straight right now to our jim clancy. he is in kuala lumpur. you know, i was just listening to that update, jim, from the head of the australian maritime authority, and they said, thus far, radar has picked up nothing. so, this is really a visual search at this point in time. >> reporter: you know, stop and take a look at the overall map and that search area. this is huge! and you have the probability that the planes are not able to stay on station for more than two hours. they spend most of their time