Depends on what you are doing
If you are just hooking up an ADS-B receiver to your PC then its like using an air-band radio: technically illegal, but the authorities neither know nor care. However it means that the openATC people (
http://www.openatc.com/) are breaking the law twice: once when they intercept, and once when they broadcast the data (disclosure is a separate offence under the same law). And of course the authorities can easily see what they are doing.
Last edited by Token Sane Person; 5th September 2008 at 20:08.
Reason: minor correction