Not to be an alarmist, but if you are interested in this subject, you might like to check out.
During the Gulf war, GPS was jammed, and there was a rush to re-manufacture and deploy LORAN system .
Which raises the idea – for those trying to simulate Flight with earlier generation planes, in earlier years, what is currently missing now are Loran Receives in the planes and Loran station on the ground.
A 3PD Adding Loran Ground station to the sim , will probably never happen, but a FAKED simulated Loran Receive might be quite possible, at least as far as giving a correct lat-Long position on it’s display.