are working at depths in that range. the topography is very difficult. >> i am just getting information from the fleet commander who says that given the amount of time that passed, for you to find the air france debris, we're 11-plus days in on this. how complicated is it to figure out given that amount of time, given the tides, the wind, the weather as john young said is not cooperating. how difficult would it be to locate the plane? >> these are relatively big pieces. it gives me a little bit of concern. it is a third of the aircraft. that is a big piece of aircraft to survive something like that. but let's hope for the best. i talked to some of the best modelers on earth.