GARMIN GTX 345 ADS-B In-Out Digital Transponder
  • GARMIN GTX 345 ADS-B In-Out Digital Transponder
  • GARMIN GTX 345 ADS-B In-Out Digital Transponder Specs

GARMIN® GTX™ 345 ADS-B "In"/"Out" Digital Transponder SKU: GRMN-XPDR-GTX345

The GARMIN® GTX™ 345 looks and operates like a standard Mode S transponder. It is a panel-mounted  IFR-certified all-in-one transponder solution for compliance with 1090 MHz ADS-B "Out" and "In" requirements with minimal expense, downtime and disruption to the aircraft panels while providing at the same time all the weather and traffic benefits of ADS-B “In”. An easy replacement for existing transponders with common 1.65-inch tall form factor, FAA and EASA approved for installation on most popular aircraft makes and models. It features a bright, sunlight-readable digital display, a pressure altitude readout, handy timers for approaches and other operations, plus dedicated pushbuttons for quick and easy squawk code entry. Its 1090 MHz ADS-B "Out" transmission capability enables automatical output of accurate and dynamic traffic surveillance data that the NextGen airspace system requires. Its ADS-B "In" reception unlocks even more capabilities for pilots, enabling display of ADS-B traffic, weather and more on a variety of installed or portable displays. Traffic monitoring requirements of ADS-B can be satisfied by either a WAAS/SBAS-compliant navigation system or an optional built-in GPS position source available with your GTX 345 transponder.

Optional remote mount GTX versions are also available for compatibility with the GTN™ 750/650 series of GPS/Comm/Nav systems, as well as select Garmin G1000® integrated flight deck systems – all of which provide built-in remote transponder code selection and control.

With the GTX™ 345, the subscription-free weather and traffic display capabilities enabled by ADS-B "In" can be interfaced with compatible cockpit displays or streamed wirelessly via Garmin Connext™ to aera 796/795 or 660 series portables, as well as to popular tablets/mobile devices by way of apps such as Garmin Pilot™, or ForeFlight Mobile. 

The GTX™ 345 ADS-B dual-link receiver can receive on both frequencies (978 MHz and 1090 MHz) authorized for ADS-B operations in the U.S. ADS-B traffic and active traffic targets are merged on the display providing a truly comprehensive traffic picture. For added situational awareness, it also incorporates a built-in audio output for audible traffic and altitude alerts, which can be integrated into the existing audio panel. 

The GTX™ 335/345 transponders can only be sold for use in experimental aircraft. Their use in certified aircraft requires their installation from a shop certified by Garmin to perform installations.

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The GARMIN® GTX™ 345 looks and operates like a standard Mode S transponder. It is a panel-mounted IFR-certified All-in-one transponder solution for compliance with 1090 MHz ADS-B "Out" and "In" requirements with minimal expense, downtime and disruption to the aircraft panels while providing at the same time all the weather and traffic benefits of ADS-B “In”. It consists an easy replacement for existing transponders, with common 1.65-inch tall form factor. FAA and EASA approved for installation on hundreds of today's most popular aircraft makes and models, the GARMIN® GTX™ 345 combines Mode S Extended Squitter (ES) transponder and optional WAAS/GPS position source in a single unit. It features a bright, sunlight-readable digital display, a pressure altitude readout, handy timers for approaches and other operations, plus dedicated pushbuttons numbered 0-9 for quick and easy squawk code entry. Its 1090 MHz ADS-B "Out" transmission capability enables the transponder to automatically output the more accurate, more dynamic traffic surveillance data that the NextGen airspace system requires. Its ADS-B "In" reception unlocks even more capabilities for pilots, enabling them to display ADS-B traffic, weather and more on a variety of installed or portable displays. Traffic monitoring requirements of ADS-B can be satisfied by either a WAAS/SBAS-compliant navigation system or an optional built-in GPS position source available with your GTX 345 transponder.

Optional remote mount GTX versions are also available for compatibility with the GTN™ 750/650 series of GPS/Comm/Nav systems, as well as select Garmin G1000® integrated flight deck systems – all of which provide built-in remote transponder code selection and control.

The GTX™ 345 also makes available the subscription-free weather and traffic display capabilities enabled by ADS-B "In" which can be interfaced with compatible cockpit displays or streamed wirelessly via Garmin Connext™ to aera 796/795 or 660 series portables, as well as to popular tablets/mobile devices by way of apps such as GARMIN® Pilot™, or ForeFlight Mobile. 

The GTX™ 345 ADS-B receiver is a dual-link system. So, it can receive on both frequencies (978 MHz and 1090 MHz) authorized for ADS-B operations in the U.S. ADS-B traffic and active traffic targets are merged on the display providing a truly comprehensive traffic picture. For added situational awareness, it also incorporates a built-in audio output for audible traffic and altitude alerts, which can be integrated into the existing audio panel. 

The GTX™ 335/345 transponders can only be sold for use in experimental aircraft. Their use in certified aircraft requires their installation from a shop certified by Garmin to perform installations.

A more detailed presentation of GTX™ 345 transponder features and capabilities is provided below.

Simple Transition to NextGen

The IFR-certified GTX™ 345  looks and operates like a standard Mode S transponder. It fits in the same 1.65-inch high slot in the avionics stack. Its features include a bright, sunlight-readable digital display, a pressure altitude readout, handy timers for approaches and other operations, plus dedicated pushbuttons numbered 0-9 for quick and easy squawk code entry. The addition of 1090 MHz ADS-B “Out” transmission capability (using precise GPS-referenced positioning information) enables the transponder to automatically output the more accurate, more dynamic traffic surveillance data that the NextGen airspace system requires. For aircraft that may prefer or require a diversity solution, GTX™ 345 is available in a diversity configuration which utilizes two antennas, mounted on the top and bottom of the aircraft,  to provide superior operational coverage. Furthermore, available ADS-B “In” reception unlocks even more capabilities for pilots, enabling them to display ADS-B traffic, weather and more on a variety of installed or portable displays. The GARMIN® GTX™ 345 series is FAA and EASA approved for installation on hundreds of today’s most popular aircraft makes and models. For decades, Garmin has led in the development and deployment of ADS-B technology in an attempt to ensure that the  transition to ADS-B operations becomes as simple, economical and worry-free as possible.

 WAAS Capability

The extra-precise GPS position reference needed to meet the traffic monitoring requirements of ADS-B can be provided either by a WAAS/SBAS-compliant navigation system that you may be already installed in the panel or by an optional built-in GPS position source available with your GTX™ 345 transponder. However the aircraft is currently equipped, the GARMIN® GTX™ 345 series offers a simple, minimally intrusive ADS-B solution to meet user needs. For even more flexibility, optional remote mount GTX versions are available for compatibility with the GTN™ 750/650 series of GPS/Comm/Nav systems, as well as select GARMIN® G1000® integrated flight deck systems, all of which provide built-in remote transponder code selection and control.

ADS-B “In” Benefits

In addition to 1090 MHz ADS-B “Out”, the GTX™ 345 also makes available the subscription-free weather and traffic display capabilities enabled by ADS-B “In” which can be interfaced with compatible cockpit displays or streamed wirelessly via Connext to GARMIN® AERA 796/795 and AERA 660 series portables, as well as to tablets/mobile devices by way of the GARMIN® Pilot™, ForeFlight Mobile or FltPlan Go apps. The ADS-B weather link is continuously broadcast on the 978 MHz Universal Access Transceiver (UAT) frequency, and is similar to the basic services offered by leading commercial satellite weather providers (for example, access to NEXRAD imagery, METARs, TAFs, winds and temperatures aloft, PIREPs, NOTAMs, and more). ADS-B traffic position reports (and threat-level symbology) can also be received for view and avoidance of converging targets in busy airspace. Spoken audio alerts call out potential flight path conflicts (“Traffic, 10 O’Clock, same altitude, two miles”) to help pilots looking in the right direction. Meanwhile, on the display, GARMIN® patented TargetTrend™ relative motion display offers a faster, more intuitive way of judging target trajectories and closure rates in relation to the flight path. As an added safety feature, available on most new GARMIN® products, the TerminalTraffic™ technology provides a comprehensive picture of ADS-B equipped aircraft and ground vehicles in the airport environment. ADS-B equipped aircraft in flight are easily distinguished from ground vehicles and taxiing aircraft, which are displayed using distinct colors and symbols. All of this information is presented on a simple, easy-to-understand SafeTaxi® diagram which references the location of runways, taxiways, hangar locations and more.

Dual-link

The GTX™ 345 ADS-B receiver is a dual-link system. So, it can receive on both frequencies (978 MHz and 1090 MHz) authorized for ADS-B operations in the U.S. Not only does this provide the most complete traffic picture from aircraft transmitting on either frequency, but it also enhances your aircraft’s ability to access ADS-B transmissions and services from virtually anywhere. When integrating an active traffic system with the GTX 345, ADS-B traffic and active traffic targets are merged on the display to give pilots a truly comprehensive traffic picture.

ADS-B for Integrated Flight Deck

With a variety of compatibilities covering most fielded displays, our ADS-B enabled GTX series transponders offer the easiest NextGen upgrade path available from GARMIN®, especially for owners of select G1000-equipped aircraft. For these systems, a remote mount version, the GTX™ 345R, interfaces with either the aircraft’s existing WAAS position source for navigation or uses an optional built-in WAAS position source to meet ADS-B “Out” requirements. The G1000 series displays interface with the remote GTX™ transponder to provide onscreen squawk code entry and control in the conventional manner. Depending on the software version installed, theGARMIN® glass displays can also support subscription-free weather on the MFD  as well as ADS-B traffic targets on both the MFD and PFD displays for aircraft equipped with Synthetic Vision Technology (SVT™).

Alerting and Altitude Encoding

For added situational awareness, the GTX™ 345 incorporates a built-in audio output for audible traffic and altitude alerts, which can be integrated into the existing audio panel. The GTX™ series transponder can be also paired with an optional GARMIN® altitude encoder to satisfy data transmission requirements for IFR. As opposed to other transponders with altitude encoding built in, the GARMIN® altitude encoder mounts separately on the install rack. So, should the transponder ever require removal, there’s no need for the static line to be disconnected, which, in turn, eliminates the need for a follow-on leak check — and thus helps minimize ongoing service costs.

GRMN-GTX345-010-01216-06

Data sheet

Certification/Approval
Certificate of Conformance
Taric
8517620010 Radio-telegraphic or radio-telephonic apparatus, for use in civil aircraft
Unit of Measurement (UOM) / Sale
Each (ea.)

Specific References

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