four orange objects spotted sunday, thought to be a compelling lead. those four objects are not from the plane. they are fishing junk. this morning an australian vessel, the "ocean shield," will make its way to the search area, carrying a high-tech u.s. navy pinger detector. it can scan under water for the plane's data boxes. cnn's paula newton joins us now, live in perth, australia. certainly, those four pieces, the pieces of orange debris, thought to be a good lead, now an empty lead. searchers frustrated here. >> reporter: absolutely. and you know when we talk to them when they get off those planes, christine, they are excited when they see those objects. they look different than other things over the last several days and they think, yes, maybe, finally, this is it. still, the prime minister of australia trying to put all of this in perspective today, saying, look, this search will be long, it will be extensive, and he wanted to make sure the world knew that he was ramping