> Even though using SDRs to listen and transmit data is not illegal in itself, please check with your local laws regarding the need to have a radio license to

> Even though using SDRs to listen and transmit data is not illegal in itself, please check with your local laws regarding the need to have a radio license to transmit on specific frequencies. Big fat warning here: in some countries such as Germany it is even illegal to receive on bands where you do not have a permit, or to use unlicensed transmitters. Let me sum it up, in case it is of interest: - FM radio band (87.5 to 108 MHz): TX banned outside of in-car adapters with extremely low power, RX free for all - Aeronautics (108-137 MHz), maritime (156-162 MHz) communication: both RX and TX illegal unless you hold a valid certificate (AZF/BZF for aero, ROC/GOC/SRC/LRC/UBI for maritime). Distributing streams or recordings is also illegal, covered by other laws, and importantly includes situations like filming on the bridge of a ship/boat... you may film it, but you have to censor the audio where radio communication can be heard according to §5 TDDDG [2]. This also applies for all other radio communications without a "free for everyone" rule (e.g. corporate radio, public transit radio, ...). - CB (26,565-27,405 MHz): RX and TX free for everyone, but respect the channel roster and power limits [1] - PMR446 (446,000–446,200 MHz): RX and TX free for everyone, but only with specially certified PMR446 devices. Ham radio equipment is not allowed, even if kept inside the regulatory requirements! - Ham radio bands (I'm not typing that list down...): RX free for everyone, TX according to the operator's license (HAREC/ECC (05)06/National class N) restrictions - ISM: RX/TX free for all but please don't be a dong. [1] https://www.bundesnetzagentur.de/SharedDocs/Downloads/DE/Sachgebiete/Telekommunikation/Unternehmen_Institutionen/Frequenzen/Allgemeinzuteilungen/MobilfunkDectWlanCBFunk/vfg212021CBFunk.pdf?__blob=publicationFile https://www.bundesnetzagentur.de/SharedDocs/Downloads/DE/Sac... [2] https://www.gesetze-im-internet.de/ttdsg/__5.html https://www.gesetze-im-internet.de/ttdsg/__5.html