ADMIX: že nejspíš patří do některé z těchto kategorií:
Common aircraft models that do not have an ADS-B transponder and are NOT visible on Flightradar24:
Antonov AN-225
ATR 42, 72 (except most new deliveries of ATR 72-600)
Boeing 707, 717, 727, 737-200, 747-100, 747-200, 747SP
All CASA models
All Bombardier Dash models
All Bombardier CRJ models
Dornier 328
All Embraer models (except most new deliveries of Embraer E190)
Jetstream 32
Fokker 50
McDonnell Douglas DC-9, MD-8x, MD-90
Saab 340 and 2000
"Air Force One"
Most older aircraft
Most military aircraft
Of course, there are lots of exceptions. For example one Lufthansa CRJ900, one LOT ATR-72, one Wideroe Dash, some MD8X from Onur Air, some Saab 340 in Australia and several private Cessnas are visible. There are also some older A300, A310, A320, B737, B747, B757, B767 aircraft flying without and ADS-B transponder, which make those aircraft invisible on Flightradar24.