**** “The counter measure is just as simple, If it emits a signal it can be found with an inexpensive hand held directional receiver” *****
or a missile that can’t miss
TT
If indeed it is a “low level” transmitter, the unit would have to be a “suicide bomber” attempt. It might interfere with GPS receivers in an aircraft, but unless I’m mistaken, aircraft don’t land under GPS control.
Just how big a missle do you need inside a jetliner?