well, for some people, the chinese ship detecting a pulse signal is unlikely. why is that? well, the ship was outside of the search area, and using a more modest piece of equipment, and the experts have said that finding a ping without having found confirmed debris first would be very, very difficult. so we will bring back our own experts to talk about this side of things. cnn aviation analyst miles o brien, and cnn regulation and government correspondent rene marsh back with us, and cnn correspondent richard quest. miles, let me start with you he here. if i told you that the ship would find the ping without finding the debris first, what would your reaction be? my first reaction would be what are the un nonpublic satellite images that got them on target, if you will. i suspect the chinese have employed a lot of assets that they don t want to talk about to assist them in locating this