Gecko
Well-known member
If you have more than a passing interest in planes, it's not hard to setup your own receiver to see what is happening.Do you ever look at any of the flight tracker sites?
All commercial planes and most light aircraft (military too when they feel like it) transmit their flight details. This is how the tracking sites get their data.
The purpose of the transmissions is primarily for collision avoidance and Air Traffic Control.
Just one example:
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