For “no internet” scenario, an alternative to RPi + dump1090 is Windows Laptop with jetvision’s RTL1090 decoder + adsbScope to display aircraft on a map. The map of adsbScope is very basic, is black and white with minimal details, but serves the purpose.
Download RTL1090 installer
https://www.jetvision.de/manuals/rtl1090imu.zip
Download adsbScope
https://www.sprut.de/electronic/pic/projekte/adsb/adsb_all.zip
adsbScope
RTL1090 beta 3
