CNN Anderson Cooper 360 April 5, 2014 00:34:00
Shallow waters off new york. investigators used one in 2009 when air france flight 447 went down in the atlantic but found nothing. if they have any luck locating the pinger from flight 370, next they'll deploy this autonomous underwater vehicle. it maps the ocean floor. >> it will start running patterns back and forth, shooting sound out the side and taking pictures. it will show objects, shiny objects basically, bright objects that could be the plane. >> reporter: right now, that's the perfect scenario. but even the head of the search effort seems to be hedging his bets. >> hopefully, hopefu...