At AVWeb, we figured the ADSB portable market would die with the 2020 mandate a little over a year away. But a crop of three new ones appeared recently and AVweb's Paul Bertorelli took them for a video spin in this indepth review of the Stratus 3, the Sentry and Dynon's DRX.This video also gives a thumbnail glimpse of how ADSB actually works.

For a really inexpensive ADSB you can build yourself, see    • Stratux DoItYourself ADSB In