[RightWhale]

Right. They couldn't be found even with scanners unless they have the right code, which is near impossible.

[BobS]

I repair TACAN antennas once in a while. The modulation frequency also had something called the "Code of the Day" for military aircraft transponders. It's interesting how you can modulate a carrier wave and sweep a band while also transferring information signals. That tech is going way above 60 Gigahertz today.

It will always be a man's job until a woman can sit in a chair and make it work:):)