Originally Posted by
treadigraph
G-ISMC doing circuits at Stapleford? Speed and height reports via ADS-B can be rather wayward
ADS-B is usually pretty reliable. Unfortunately G-ISMC doesn't have it fitted - that's the problem.
In such cases, FR24 relies on multilateration, which is dodgy at the best of times. For example FR24 reckons the C152 has made several visits to LCY today, which sounds a tad unlikely.