The Garmin GTX-345 is a one-box ADS-B and Transponder solution. It combines a Mode S Extended Squitter (ES) transponder, an internal WAAS GPS position source, and both ADS-B Out and ADS-B In capability in a single compact unit. The GTX-345 delivers simplicity, compliance, situational awareness, and safety.

ADS-B In: See the Whole Picture

The GTX-345 takes a big step beyond the GTX-335 by adding ADS-B In reception. With its dual-link receiver (1090 MHz and 978 MHz UAT), the GTX-345 captures both traffic and subscription-free weather information. This gives you free access to the same FAA services available through ground stations.

Compatible panel-mounted displays such as Garmin GTN series, GNS WAAS units, G3X Touch, G500/G600, G1000, and MX-20/GMX-200 present this information right where you need it. For added flexibility, the GTX-345 can wirelessly stream ADS-B In data to portable devices running Garmin Pilot, ForeFlight, or compatible Garmin portables. This allows you to view traffic, weather, and even backup AHRS attitude information directly on your tablet or smartphone.

ADS-B Out: Be Seen Clearly

Like the GTX-335, the GTX-345 provides full ADS-B Out functionality. The GTX-345 uses its built-in WAAS GPS receiver to determine your precise location, then broadcasts your aircraft’s flight ID, position, velocity, altitude trend, and heading. It transmits using 1090 MHz Extended Squitter (1090ES) technology, which is permitted at all altitudes and required for flights above FL180 or in Class A airspace. This gives ATC and nearby traffic a clearer picture of your location and intentions. This level of visibility increases situational awareness and contributes to a safer airspace for everyone.

Built-In WAAS GPS Simplifies Installation

One of the standout features of the GTX-345 (P/N: P/N: 011-03302-40) is its integrated WAAS GPS Receiver. This internal GPS source means you don’t need to connect to an external WAAS GPS navigator for ADS-B. This reduces installation complexity, which is especially helpful in aircraft with limited panel space or older avionics. (Please note this WAAS GPS is strictly for ADS-B, and cannot be used for navigation.)

Extra Safety Features

The GTX-345 integrates several additional features designed with pilot workload and awareness in mind:

• Traffic and altitude alerts via audio output that can be routed through your Audio Panel.

• Backup attitude (AHRS) data displayed on compatible apps and devices for added redundancy and safety.

• Altitude deviation alerts help keep your aircraft on assigned altitudes.

Transponder Convenience

Beyond ADS-B, the GTX-345 retains all of the convenient features of the GTX-335, including:

• Large, bright digital display for easy readability

• Numeric keypad for fast squawk code entry

• Dedicated VFR button to immediately set 1200

• Count up/down, flight, and trip timers

• Display of pressure altitude, OAT, and density altitude (with OAT probe input)

At just 1.65 inches tall, the GTX-345’s slim profile makes it easier to fit into your panel. While it is not a plug-and-play replacement for your Mode C Transponder, it may fit in the panel space vacated by your radio. And the GTX-345 is certainly more capable and reliable than your old Mode C Transponder.

A Complete ADS-B and Transponder Solution

The Garmin GTX-345 combines capability with simplicity. The GTX-345 allows you to meet the FAA’s ADS-B Out requirement and gain the valuable traffic and weather awareness available for free via ADS-B In. For pilots looking to maximize capability and minimize panel space, the GTX-345 helps you fly safer and smarter.

If you have any questions about this item, please click to send us an email.