and they have the possibility of both unmanned submersibles and manned submersibles. the chinese have one that they have already said in news reports that they want to send down. i forget the chinese name but it's translated sea dragon and that holds the record for under water dives, it can go down 4.5 miles. >> is there other technology? are they doing the right thing from an investigation and crash stand point? >> we don't know everything that they know. when air france 447 was found, there was three autonomous under water vehicles that were used in a search pattern. so clearly we're not doing it as intensively as we could. but then again, the search area that they're looking at right now is fairly compact. we know where those pings were found, the range of the pinger locator is only about two miles