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  • Overview
    The GDL 82 Automatic Dependent Surveillance-Broadcast (ADS-B) datalink, is the latest addition to the comprehensive lineup of certified ADS-B solutions available from Garmin. GDL 82 is a small, lightweight Universal Access Transceiver (UAT) datalink with a built-in GPS receiver. For aircraft owners looking for an economical and turnkey solution to satisfy the requirements of ADS-B “Out”, GDL 82 is a straightforward path to meet regulatory requirements.

    GDL 82 broadcasts on the 978 MHz frequency, providing a rule-compliant ADS-B “Out” solution for aircraft operating below 18,000’ in the United States. Installation is quick and easy because GDL 82 utilizes a patent-pending design, in which GDL 82 is installed in-line with the aircraft’s existing transponder antenna wiring to transmit the necessary ADS-B “Out” information. The WAAS GPS receiver required for ADS-B compliance is built-in and a GPS antenna is included to offer additional cost-savings for aircraft owners without an existing WAAS GPS on board their aircraft.

    82 also contains AutoSquawk interrogation technology, whichGDL interfaces with most Mode C general aviation transponders to synchronize the squawk code and pressure altitude information from the transponder with GDL 82, eliminating the need to install a separate dedicated UAT control panel and altitude encoder. (Please reference the installation manual to determine if the existing Mode C transponder meets compatibility requirements.) This technology not only simplifies installation but also eliminates the burden of the pilot manually keeping the squawk code in sync.

    Pilots who already utilize an ADS-B “In” receiver — such as the GDL 52, GDL 39/GDL 39 3D and the Stratus line of portable solutions — can receive additional benefits as the GDL 82 complements many existing products on the market. With ADS-B “Out” participation, pilots using these products have access to a more comprehensive ADS-B “In” traffic picture, resulting in improved situational awareness.
  • Features
    • Small, lightweight ADS-B “Out” datalink designed to work with your existing transponder
    • 978 MHz universal access (UAT) output enables aircraft to operate in controlled U.S. airspace below 18,000'
    • Uses AutoSquawk technology to automatically sync with the existing transponder in your aircraft
    • Includes built-in WAAS GPS position source (for ADS-B reference only)
    • For inflight privacy, an Anonymous mode can be set to mask your aircraft ID from displaying on other aircraft’s ADS-B “In” traffic display
  • Specifications
    • Unit size, WxHxD: 3.39" x 1.48" x 9.22" (8.6 x 3.8 x 23.42 cm) including connectors
    • Weight: 1 lb 4 oz (0.57 kg) with WAAS GPS
    • Temperature: -45°C to +70°C
    • Power input: 14 or 28 VDC (8 W max.)
    • Transmitter output: 46 dBm (40 W)
    • Environmental compliance (TSO Approved): DO-160G
    • Software compliance (TSO Approved): DO-178 Level D and Level B
    • Hardware compliance (TSO Approved): DO-254 Level C
    • TSO compliance (Approved): TSO-C145d (B2), TSO-C154c (B1S)
  • Documents
  • In The Box
    • GDL 82 ADS-B “Out” Datalink
    • Connector Kit
    • Garmin GA 35 WAAS GPS antenna
  • Videos
  • Accessories

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  • Reviews

    Write a review

    by Matt

    First unit was dead, would not power up. There is no power indicator on the box, so dead is evidenced by failure to connect and configure, which could be wiring, your computer, or your USB A-B cord.

    Pinout Figure 5-1 has the middle row incorrectly indented right - should be indented left. The view is looking at the box.

    Would be nice if mounting holes matched a GTX327 rack. I mounted under the glove box.

    2nd unit worked good and qualified for the $500 FAA rebate in time.

    by Steve

    Several mistakes by Garmin in Manual. The USB connector that they give you is cheap. This unit uses a High Density size 1 connector that is non replaceable from Garmin.
  • Q+A

    Ask a question

    What is in the box for the Garmin GDL 82 Built In GPS Kit including WAAS? What additional items will I need to purchase to install?
    The box comes with the GDL 82, GA 35 WAAS GPS and the installation kit. You will still need coax cables from the GDL 82 to the transponder antenna and the unit to the WAAS GPS antenna. You will also need wire to draw up the wire harness for the unit.

    Will the GDL 82 be able to display TIS-B and FIB-B onto an Aera 660 through a cable like the GDL 39 does?
    No. The GDL 82 is only an ADS-B out unit. It does not perform ADS-B in functions.

    Does the Garmin GDL 82 Built In GPS Kit including WAAS include the WAAS GPS antenna?
    Yes, this kit comes with the Garmin GA 35 WAAS antenna.

    Is the Garmin GDL 82 compatible with KT76A?
    Yes, it is. Though you will want to get a transponder test to make sure your unit is operating properly.

    Does the GDL-82 unit need to be turned on AFTER the transponder is turned on? Can I turn on this unit BEFORE turning on the transponder?
    The GDL 82 powers on with the aircraft.

    I have a non waas Garmin 430 and a Garmin 327 Transponder---will I be able to utilize these units with the GDL-82?
    Yes. The gdl-82 will interface with the 327 antenna output to make the signal compliant.

    Looking at pics, I will need a female-female BNC cable from GDL-82 to transponder antennae. I know its BNC for the GPS antennae at the GDL-82 end. Is the GPS antennae have an MCX or BNC connector on it?
    You will need a BNC male to BNC male cable. BNC connectors are based on the inner pin, not the housing. The GA 35 WAAS GPS antenna has a TNC female antenna connector on it.

    Will this Garmin GDL 82 work with an older Mode C such as a Collins TDR 850 or an analog King?
    Yes. Per Garmin, this unit will work with any mode C transponder that is in good working condition. A transponder test is recommended to ensure that the unit is operating properly.

    Is the Garmin GDL 82 compatible with a Becker transponder?
    Yes, it is.

    I have a G3X and G5 and both have WAAS GPS antennas, with a GTX327 transponder. Do i need to install yet another GPS antenna or can it use the CANBUS from the G3X or G5 to get a position source to the Garmin GDL 82?
    You will need a GPS 20A with a connector kit and a GA 35 antenna. This unit can give GPS info to the G5 without having to buy a second antenna for the G5.

    Will the Garmin GDL 82 work with the Sandia Aero Space mode c stx 165 transponder?
    Yes, it will.

    Will the Garmin GDL 82 work with a KT78 transponder?
    Yes. Per Garmin, this unit will work with any mode C transponder that is in good working condition.

    Will the Garmin GDL 82 work with the Narco AT150?
    Yes. Per the manufacturer, the GDL82 has been tested with the AT150 with no issues. The AT150 should pass a transponder test to ensure that it is functioning properly.

    Will the Garmin GDL 82 work with the NARCO AT165 transponder?
    Per the manufacturer, it should function although a transponder test is recommended to ensure that your unit is operating properly.

    Will the Garmin GDL 82 work with a Garmin GTX320 transponder?
    Yes. Per Garmin, this unit will work with any mode C transponder that is in good working condition. A transponder test is recommended to ensure that the unit is operating properly.

    Would a Garmin GTX320A have the same answer as a GTX320?
    Yes, both cannot be guaranteed.

    I have a GNS 530W. Can I use the existing GPS signal for the 530W to drive the GDL82 position as well , or do I need to install a second GPS antenna?
    Yes, the GDL 82 will accept GPS data from an existing GNS 400W/500W series. No second GPS antenna is needed.

    How do you go about setting up the GDL-82 to input your tail number and/or the ICAO code for your aircraft?
    Configuration of the GDL 82 has to be done via USB connection and computer, this would include inputting your iICAO code.

    Will the GPS signal from a KLN90B drive the GDL82 without a second GPS antenna required?
    Per Garmin, the only compatible GPS data sources are the GTN 6XX/7XX, GNS 4XXw/5XXW, or the GNS 480. The included GA 35 WAAS GPS Antenna would need to be installed.

    Please supply the dimensions of the GPS antenna included with the Garmin GDL 82 kit?
    Approx Dims: 4.68 x 3.00 x 0.81 inches.

    Does the GDL 82 come with all TSO certificates needed for legal installation & complete install and hook-up directions manual?
    The GDL 82 is a TSO ADS-B out solution that comes with the unit, rack, connector kit and GPS antenna. You can contact our avionics sales department for a PDF copy of the manual but it will be posted on Garmin's website soon.

    I have a Garmin G5 installed in my PA24-250. Can you use the GA 35 WAAS antenna that comes with the GDL 82 as a GPS source for the G5? If yes can the signal be split or is other equipment required?
    The antenna coax cannot be split but you can run a RS-232 lead from the GDL 82 to the G5 to share the GA 35 WAAS information.

    Has the Garmin GDL-82 received final approval for installation from the FAA, the Garmin website does not make that clear?
    The Garmin GDL 82 has not yet received final approval. The units will be shipping as soon as that is complete, which is expected this month.

    Will the Garmin GDL 82 provide a WAAS GPS source to other devices?
    Yes. That is the plan for the GDL 82. To provide this GPS information to other devices via a RS-232 input.

    What does the 10 harness option include? Just a 10ft power/ground cable, or the required GPS Antenna to GDL82 cable, and Transponder Antenna to GDL82 cable as well.
    The GDL82 harness includes - power/ground, RS232, USB dongle, anonymous mode, and squat switch provisions. It does not include an antenna cable.

    Is the Garmin GDL 82 compatible with the King KT76A? Thanks

    Does the Garmin GDL 82 Built In GPS Kit including WAAS work with my GTX 330?
    No, this cannot be installed with a Mode S transponder.

    I have a 406 mhz ELT installed. Is the ICAO code required for Garmin GDL-82 ADS-B Out the same code as the ICAO SARSAT code for Search & Rescue in the ELT?
    Yes, the ICAO code for your aircraft is a set registration number. For U.S. based aircraft, the GDL 82 install tool will automatically compute your ICAO address based upon your registered tail number. For international aircraft, your ICAO code can be obtained from your aircraft registration authority.

    I visited the Garmin booth at NBAA in Las Vegas 2017 and salesman said that it could be installed by an A&P mechanic and not have to go through an avionics shop and be certified/legal. I dont see any mention of that. Is that still the case?
    The GDL 82 can be installed by an A&P, and does not require purchase or installation through an avionics shop. The A&P must be able to test the transponder to verify the installation.

    May I purchase the harness now and the GDL 82 kit later? Is it available now? Price?
    The GDL 82 harness is made from some of the components included in the GDL 82 kit, so we do not sell it off the shelf currently. We can special order one for you, please contact our sales department for price quote and lead time.

    Regarding Garmin GDL 82: Is the 10-foot harness for this device fabricated by Aircraft Spruce, or does it have a Garmin part number?
    The 10 foot harness is fabricated by the Aircraft Spruce harness shop.

    Is the GDL 82 compatible with the Becker Transponder mdl ATC 4401-1-175 mode c unit?
    Yes. Per Garmin, this unit will work with any mode C transponder that is in good working condition. A transponder test is recommended to ensure that the unit is operating properly.

    Can this GDL 82 unit be installed by my AP/IA or does it have to be installed by an avionics shop? This is for a certified aircraft
    Yes. This unit can be sold to both experimental and certified aircraft and it can be installed by an A&P.

    Will the GDL 82 commicate to my ipad so I can receive weather and traffic?
    No. The GDL 82 is only an ADS-B out unit. It does not perform ADS-B in functions and does not have any wireless capabilities. You would still need the GDL 39 or GDL 52 for ADS-B streaming to an iPad.

    Does the Garmin GDL82 installation kit include the required Airspeed/Squat switch and the USB harness and plug?
    The USB harness and plug is provided but, the user must supply the squat/airspeed switch.

    Can I use the GDL82 GPS for a source to feed the Garmin GTR-225?
    According to the manual, the GDL 82 does not communicate with the GTR 225. It will communicate with GTN 600/700 and GNS 400w/500w.

    Just purchased the GDL-82 and am wondering what type of connector is on the unit for the WAAS GPS antenna cable. I understand the GPS antenna has a TNC connector but dont see what type of connector is found on the UAT Box?
    For the transponder antenna, there are female BNC (need male BNC ends) for the GPS side it is a female TNC (need male TNC ends).

    In the anonymous mode for VFR flight (i.e. 1200) does the GDL 82 mask the ICAO code from ATC as well as other aircraft?
    PER THE GDL 82 manual: In anonymous mode, the GDL 82 transmits a temporary address instead of the aircraft's assigned ICAO address code, and a temporary Flight ID.

    I currently have a local shop installing a GDL 82 in my C182 and I assumed it would be compatible with my GTX 330 (no ES). I just saw the post saying it is not compatible with the GTX 330. Is that true?
    The GTX 330 is a mode S transponder and the GDL 82 does not support mode S transponders. The GDL 82 only supports mode C only.

    When the GDL 82 is installed, will the transponder signal pass through the GDL 82 box to the antenna if the GDL 82 is turned off?
    Per the Garmin GDL 82 manual there is a discrete line to annunciate GDL 82 failure. But it will not interfere with the transponder signal, and continue to transmit mode a/c.

    Does the Garmin GDL 82 require a blade type transponder antenna?
    Garmin gives a list of tested/approved antennas. There are other that work just not tested by Garmin. The list is available in the installation manual. The Install Manual is available as a free download in the Documents tab of this webpage.

    I have a 1962 model Cherokee 160B which has a 12 volt elec system. I noticed that the GDL82 requires either 14 or 28 volt. what would I have to do to use the GDL 82?
    14v and 12v are interchangeable. It will work fine in your 12v application.

    Can this Garmin GDL 82 unit be installed in a Cessna C-162 Skycatcher with Garmin G-300s?
    The make and model of the aircraft, as well as the G-300s, is irrelevant when determining if this will work in your aircraft. The determining factor is that your aircraft is equipped with a functioning mode C transponder. We recommend having a transponder test done to determine that your transponder will pass and work with the Garmin GDL 82.

    Will the Garmin GDL 82 be compatible with a KT79 transponder and an existing A-33 Antenna?
    Because the KT79 is a mode C this will work. Per the installation manual the antenna must be A-33W version to support WAAS.

    Is the wiring harness that you build is complete and ready to go, does it have the proper pig tail installed so it can be plug into a computer or laptop a start the proses of entering info into the gdl 82 .
    The harness comes with power, ground, usb port, and additional discrete lines.

    When you make a harness do you label whats what? power, ground, etc.
    Yes. Each wire is labeled accordingly with a blue heatshrink label with text printed on it.

    Does the installation of the GDL 82 require an STC?
    The GDL 82 is a TSO'd product, it does not have an STC and does not need one to be installed.

    I have a KT73 Transponder. Will the GDL 82 work with this?
    The GDL 82 is made to work with mode C transponders. Because the KT-73 is a mode S, it will not work.

    If needed, can the harness for the Garmin GDL 82 be made longer than 10 ft?
    Yes, please contact our avionics sales team for a quote and lead time on a custom harness for the GDL 82.

    Can I install the gdl82 in my RV9A for which I have the repairman certificate?
    The gdl 82 is designed to be installed in an aircraft with a mode c transponder to provide ads-b out. So, if your RV has a mode C transponder, this will work great for your application.

    Is this Garmin GDL 82 compatible the the Garmin GTX 327 transponder?
    Yes, since the GTX 327 is a mode C transponder, this is compatible.
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