once the transponder was turned off the plane went dark and it was very difficult to track and a lot of it was superposition. in this case there's no indication so far that there was any issues such as those, so i think -- i think we'll be driven by the data. it will point us in a direction. but still, the ocean is awfully big. i've searched for things there. it will take a little time. but i think we should have the data to narrow this search down and get some results within the next day or so. >> peter, we know the pilot actually asked to change course to travel due west and then throws increase the altitude because of the bad weather but there wasn't a distress signal from the plane. what does that tell you >> pilots are trained to navigate and to aviate. they want to avoid any kind of stress to their passengers. if they see bad weather in front