signal. the section detection on the return leg was held for approximately 13 minutes. on this occasion, two distinct pinger returns were audible. significantly, this would be with recorder and cockpit recorder. remain in the area and continues to remain in contact with the tow pinger electricitier. at this point he has not been able to reacquire the signals. >> this is the scary news, at any time the bears are -- batteries are expected to die. roger maynard is live in sydney. roger? >> well, hello, greta. this is obviously a major break through. the australian navy vessel picked up the pings in the last 4 hours. as one occasion it lasted