Operating scanners or amateur radios or a SDR is fine, you're just not allowed to intentionally tune it to any non-public frequencies, and if you're just idly b

Operating scanners or amateur radios or a SDR is fine, you're just not allowed to intentionally tune it to any non-public frequencies, and if you're just idly browsing through the spectrum then as soon as you realise that a transmission isn't public you need to stop listening immediately and forget anything you have received so far. > How would they even begin to know you're listening to those frequencies as opposed to something else? Or course the can't know that – what it effectively means is you can't do in public and shouldn't talk about it too loudly (hence e.g. liveatc.net doesn't have any coverage in Germany).