the black box, hoping to get much needed answers first. randi kaye, cnn, new york. >> announcer: this is cnn breaking news. all right. we're going to continue the conversation now. we've got breaking news in from the chinese state news agency xinhua, that chinese patrol ship searching the area of the indian ocean has detected a pulse signal. >> a pulse signal. >> a pulse signal. that's as much as we know about this. so let's bring in an expert who can tell us more, simon boxwell, oceanographer with the nationalography center. >> let me ask you, simon, we're hearing this is a pulse signal with a frequency of 37.5 kilohertz per second in the indian ocean, does that mean anything to you? >> without hearing any more