is this period of time where you could turn off your transponder and nobody would notice. but if it were one particular area, the alarm bells would come up because you would disappear from the screen and you would start to call people right away. so the handoff is a key time if you were trying to go missing put it that way, that would be the time to do it. >> and david, lastly, there has been so much back and forth from the final words from the cockpit. we now know it was the captain saying good night, malaysian flight 370, not the co-pilot. quickly why is it so important to get it right? >> what is important to me is who is the pilot flying and who is the pilot not flying? this indicates because there were 12 minutes between the last communications it tells me that the control of the aircraft switched. and if it is something