possible pings, were detected by the ocean shield's equipment. guess what, there was no debris anywhere, so there's still a lot of unanswered questions. and until you actually can locate something tangible, you have no confirmation this is connected to flight 370. promising, yes, but tempered optimism is a great way to put it. >> will ripley putting in some great hours for us in perth, australia, thank you for that. i'm joined live here in new york by two men with deep expertise in the underwater aspect of this sherif search. a firm that designs and builds advanced underwater communications gear including black box pingers and also the pinger detectors it david kelly is the president and ceo of bluefin robotics whose underwater robot is effectively standing by ready to map the ocean floor whenever the search teams are confident they have found the spot. so effectively it moves from your gear, at least one part of