Lots of places are still unencrypted -- e.g. in NYC the PD &amp; FD dispatch are unencrypted UHF. Looking at a huge waterfall of Brooklyn NYPD on a $20 SDR dongle -&gt; <a href="https:&#x2F;&#x2F;imgur.com&#x2F;VukYvB6" rel="nofollow">https:&#x2F;&#x2F;imgur.com&#x2F;VukYvB6</a>