

I don’t think it’s realistically possible to do that totally undetected. Since the earth’s magnetic field is so weak and field strength goes down rapidly as distance increases, malicious actors probably couldn’t spoof patterns well enough to make the data look real, at least not without coming very close and staying near their target.





I’m guessing they meant sonar instead. AFAIK active sonar does work really well, but is rarely used since it reveals your location twice as far as you’re able to detect others. Not to mention the horrible effects on wildlife - the sound waves carry so much energy that a point-blank hit is somewhere between “lethal & untreatable” and “turned into red mist”.