Originally Posted by
ShyTorque
For what it’s worth, FR24 certainly can’t be treated as gospel. I was being curious and tracking a helicopter on FR24 only a day ago, the same type that I fly. I watched it flew past here on a constant heading at about 120 knots. FR24 showed a ground speed of 307 knots (!) then zero and showed it carrying out a couple of tight 360 degree turns, which it certainly never did.
That's a very good point.
If the terrain is not conducive for reliable radio transmissions, the FR24 receivers will likely have a hard time plotting it too. Particularly if they were MLAT-ing it.