Indeed! Mekoning (or more correctly maeconing) was the re-broadcasting of navigation signals from a different location, to confuse unwary chaps. The classic case in the ‘70’s was an NDB (I think) in northern Germany that was “cloned” by the naughty Ruskies and re-broadcast at higher power to tempt the boys to head too far East.
As I remember, it caused quite a few “Brass Monkey” shouts but never an actual whoopsie.
Ah, heady days!
Mog