black boxes. >> reporter: another day of searching above and below the water for signs of flight 370 is now under way. forget cautious optimism, the australian prime minister, tony abbott, is oozing confidence. >> we have very much narrowed down the search area and we are very confident that the signals that we are detecting are from the black box on mh-370. >> we are confident that we know the position of the black box flight recorder to within some kilometers. >> reporter: his tone stronger and more upbeat compared to the careful wording two days ago from the man coordinating the search. >> i think we're looking in the right area, but i'm not prepared to confirm anything until such time as somebody lays eyes on the wreckage. >> reporter: but with rumors flying, the black boxes were located overnight. angus houston released a statement saying quote, there