desperate. the underwater search has been continuing around the clock. so far, though, nothing. today, australia's ocean shield, the ship that heard pings over the weekend is at the northern end of the defined search area. and at the south, the chinese ship haixun 01 which also believes it heard pings over the weekend, which by definition would be unrelated because they're hundreds of miles apart. the british ship hms echo is joining the search. it's been two days since searchers on the ocean shield believe began at the north came from the plane's black boxes. they have not been able to reacquire the pings. they have heard nothing, and they have found nothing. and time is fading fast. we're on day 33 now of the search. black boxes would have to be incredibly resilient to be working at a very audible level at this point. we've seen the search area shift, expand so many times. look at this map. just look at this map. now, you might say it's a miracle given that it could have been within thousand -- many,