Transponder and ADS-B planning for Garmin aircraft upgrades

Garmin ADS-B transponder planning - GTX 345, GTX 335 and accessories

ADS-B and transponder requests need more than a model name. Existing equipment, GPS source, antenna status and intended capability all affect the Garmin quote.

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  • GTX 345 and GTX 335 planning
  • GPS source and antenna checks
  • ADS-B quote preparation

Content updated:

Define ADS-B capability

Clarify whether the project requires ADS-B Out, ADS-B In, transponder replacement, fleet standardization or troubleshooting support.

Check the GPS source

A compliant GPS source and connected avionics can affect the correct Garmin transponder path and the supporting accessories needed.

Include installation context

Antenna status, rack space, cabling and existing transponder model help avoid quoting an incomplete or unsuitable package.

Garmin GTX 345
Garmin reference photography · Garmin GTX 345

Before choosing: compare the complete requirement

Use this decision aid with the existing guide. Confirm the exact aircraft, configuration and current manufacturer data before ordering.

DecisionFirst considerationSecond considerationBefore ordering
Out versus InGTX 335 provides ADS-B Out.GTX 345 adds ADS-B In capability.Define transmission needs separately from receiving/displaying traffic.
Position sourceIdentify the exact GPS-source configuration.Identify the exact GPS-source configuration.An installed GPS is not automatically a suitable ADS-B position source.
Display and regionOut does not imply traffic/weather reception.In functions depend on connected equipment and coverage.Do not assume U.S. broadcast weather is available in Israel.

Illustrative example — not a real customer case

A received service is a separate question

An illustrative owner expects a new transponder to show weather on a portable display during flights in Israel.

  1. Define Out/In, the exact GPS/display arrangement and intended regions; verify actual service coverage separately from radio capability.

The comparison now has an explicit scope. This illustrative case does not approve a model, quote a price or promise a completion date.

Sources and further reading

Use this guide to prepare a request. Exact suitability, installation eligibility, applicable documentation and service scope are confirmed for the specific equipment and application.

Who prepares these guides?

Published by Nisso Dekalo Ltd.

Published by Nisso Dekalo Ltd., using the cited manufacturer and regulator publications and our equipment-enquiry process. Our laboratory and offices support local enquiries; aircraft and helicopter installation and maintenance work is carried out at Avir-Rom (1993). The worked examples and original diagrams are illustrations. Exact suitability and work scope are reviewed for the particular equipment and application.

Our local laboratory, installation and maintenance support
Explore all practical guides

Make a better decision

Separate equipment capability from the received service

Compare an exact transponder/GPS/display configuration. ADS-B In equipment capability does not establish broadcast-service coverage at the intended destination.

Situation / optionCompareNext step
GTX 335 pathADS-B Out: transmitting the required aircraft information. Define the applicable position source and exact variant.List existing transponder, navigator and the actual requested capability.
GTX 345 pathAdds ADS-B In reception; traffic presentation depends on compatible connected equipment and the installation.Name the intended cockpit display or portable device, not just the transponder.
GPS configurationInternal-source and external-source configurations require different package checks. An existing GPS label alone is insufficient.Ask for source, antenna and interface confirmation in the written scope.
Traffic / weather / regionRadio capability, display support and local service availability are different questions. U.S. broadcast weather must not be assumed in Israel.State the operating regions and ask which functions are actually supported there.
Exact equipmentInterfaces / connectionsAccessories / kitsReviewed work / documents
Purchasing-package map. It identifies scope and does not define wiring or installation.

Prepare your own enquiry

Replace the bracketed fields with your actual details. Keep unknown information marked unknown. This is a request template, not an order.

Illustrative request example — not a real customer case
Aircraft and operating regions: DEMO aircraft; flights in Israel and stated additional regions
Existing transponder and GPS source P/Ns: Installed transponder/GPS references attached
Out / In / intended traffic display: Compare required Out/In functions with the intended display
Required unit, antenna, interface and installation scope: Confirm GPS, antenna, interface, installation items and local service limitations

Technical terms in plain language
P/N
The full part/configuration identifier, preserving every suffix.
S/N
The individual unit serial; it is separate from the model and P/N.
Installation eligibility
The aircraft-specific suitability/approval question resolved through the applicable data and responsible organisation.
Sources and further reading · References checked:

Document identifiers and revisions below describe the cited references. Confirm the current applicable revision for the exact equipment before work or supply.

Dealer and quotation support

Supplier contact

Nisso Dekalo Ltd supports Garmin Aviation enquiries in Israel. Verify the current dealer listing through Garmin, then send the exact aircraft and part-number context needed for an accurate quotation.

Dealer listing you can verify

Use Garmin’s official dealer locator to confirm the current Aviation listing and contact details before purchase.

Operating since 1968

Longstanding aviation parts and avionics procurement experience for pilots, aircraft owners, operators and maintenance teams.

Quote by aircraft and part number

Requests are checked against the aircraft, installed avionics, exact Garmin model, accessories, documentation and required date.

Need a Garmin quote by part number?

Send the aircraft make/model, current avionics, exact Garmin model or part number, required accessories and target date. Compatibility and approved installation data are confirmed for the specific aircraft before ordering.

Request a quote

Relevant Garmin products

GTX 23 ES GTX 23 ES 010-01014-03 GTX 3000 GTX 3000 010-00736-00 GTX 325 GTX 325 010-01083-01 GTX 330D Transponder (010-00293-00) GTX 330D Transponder (010-00293-00) 010-00293-00 GTX 335 with WAAS GTX 335 with WAAS 010-01214-41 GTX 335, NVG Compatible GTX 335, NVG Compatible 010-01214-21 GTX 335, Standard Kit GTX 335, Standard Kit 010-01214-01 GTX 335D, ADS-B GTX 335D, ADS-B "Out" Transponder with Diversity 010-01773-01

Garmin Aviation FAQ

Is GTX 345 the only Garmin ADS-B option?

No. The correct model depends on required function, existing equipment and project scope.

Do accessories matter for a transponder quote?

Yes. Antennas, racks, cabling and GPS source can change the correct quotation.