DaveReidUK, re, "Don't confuse precision with accuracy.
",
Yes, agree - if the writing came across that way, it wasn't intended - I'm aware that one can be both precise and inaccurate, etc.
FlightDetent;
My larger point is not to rely upon FR24 for any serious data work, particularly lat/long. The system isn't designed for it and we don't know the concurrence between a commercial, non-specialized system such as FR24 data and a system engineered for such data recording like the flight-recorder/QAR data.