Quote Originally Posted by helomech View Post
I am not worried at all about the missing planes. I don't believe there is any way they could get them into the U.S. We fly offshore for a living, and if our transponder stops working or does not give them proper information they will have F-15's on us quick. A unregistered jet would have no chance.
So, they just stream in with a regular flight, squawking the same code. If the radar breaks out two different targets with the same code, it will be interpreted as a mechanical or software error. At distance, they could just turn off the transponder and the radar wouldn't detect a primary target at all.