For basic (yet modern) Mode G altitude reporting duties, we favor Garmin's GTX 325 paired with its miniature altitude encoder
Now that the much anticipated ADS-B mandate has come and gone, there’s still a need for replacement transponders. Yes, Mode C altitude reporting capability lives on. Some buyers opted for standalone ADS-B systems (the uAvionix tailBeacon and skyBeacon and Garmin GDL 88 units come to mind), which left plenty of aircraft still sporting basic Mode A/C squawk boxes
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Editor in Chief Larry Anglisano has been a staple at Aviation Consumer since 1995. An active land, sea and glider pilot, Larry has over 30 years’ experience as an avionics repairman and flight test pilot. He’s the editorial director overseeing sister publications Aviation Safety magazine, IFR magazine and is a regular contributor to KITPLANES magazine with his Avionics Bootcamp column.
