Peter Duniho wrote:

Theoretically, one could use direction finding equipment, but I doubt that's
practical in most cases; I think the DF information obtained through the FSS
would have to be correlated with radar data somehow, and I don't know how
well -- if at all -- those systems are linked. It could come down to
old-fashioned process of elimination; figuring out which aircraft can still
communicate, and eventually whittling the number of aircraft that can't
communicate down to one.

When the local FBO does it, I call them on the phone...

So nobody has ever froze and held the button down during a landing?