Garmin’s GTX 345/335 ADS-B transponders have been approved by EASA for a variety of airplanes and helicopters. Both transponders are available in panel- and remote-mount versions, and they are compatible with many Garmin displays. Remote versions can be installed with Garmin GTN 650/750 systems and G1000 integrated flight decks.

The panel-mount GTX units measure 1.65 inches high and can replace transponders such as Garmin’s GTX 327 and others. In addition to dedicated buttons for entering numeric squawk codes, the GTX transponder has a built-in timer and a sunlight-readable display that also shows pressure altitude.

Both the GTX 345 and 335 are available with an optional Waas/GPS sensor to meet the ADS-B OUT requirement. The GTX 345 provides dual-band ADS-B OUT/IN for displaying traffic on compatible displays, and it shows Garmin’s TargetTrend and TerminalTraffic. Audible traffic alerts can be delivered via the aircraft’s audio panel. The GTX 345 also offers Garmin Connext, with both wireless connectivity and built-in AHRS for delivering ADS-B traffic, GPS position and back-up attitude information to mobile applications such as Garmin Pilot and Garmin’s aera 660 and 796/795 portable navigators. The GTX 335 lacks the ADS-B IN features.

The GTX 345 retails for $5,795 with Waas/GPS, or $4,999 without Waas. The GTX 335 costs $3,795 with Waas or $2,995 without. Prices are the same whether panel-mounted or remote-mounted.