only tell a difference from the jetliner to the satellite, not location, not even northern or southern hemisphere. from it is last ping experts were able to plot position points and a spot where the jet would have run out of fuel. connect the dots, because the earth is round, you get two arcs. the jetliner could be anywhere along here. most likely on this southern track. in fact, two sources tell us the plane most likely went down in this south indian ocean far west of australia. still malaysian officials say they're investigating both arcs and have asked countries to their north to provide satellite and radar data. finding the plane and its black boxes remains the highest priority. the cockpit voice recorder which recycles every two hours may not have any voices after more than seven hours in the air, unless the roersdz were disabled, which a pilot can do. >> i pot pooi lot can turn off the voice recorder and data recorder by pulling circuit breakers, very easy.