indonesian air space. the source said that move may have been intentional to avoid radar detection. in the search in the indian ocean, the focus is on the area where a chinese ship said it detected two pulse signals. the signals heard friday and saturday were a little more than a mile apart, and right now a british ship with advanced equipment is heading there to check it out. an australian ship also picked up an acoustic noise but in a different area to the north. they can't verify that any of it is connected to the missing plane. all right, let's check in now with will ripley in perth, australia. will? >> reporter: fred, the search area is larger, as you mentioned, after seeing it go down in size for most of this week, it increased to 6,000 square miles. they're searching for this debris field which on day 37 still has not been spotted. not one single piece of debris from flight 370 has been