Garmin GDL 82 ADS-B Out Transmitter with GPS


Availability: In stock

Product ID: 5838A

Garmin’s least expensive ADS-B Out solution

Looking for a low cost, easy-to-install ADS-B Out system that keeps your existing Mode C transponder in place? Garmin’s innovative GDL 82 is the perfect solution. This 978 MHz UAT can be installed between your existing transponder and transponder antenna, so there’s no need for extensive panel work. Also includes a WAAS GPS for total compliance with the FAA’s 2020 ADS-B Out mandate.


Single-entry Squawk Code

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Garmin’s least expensive ADS-B Out solution

Looking for a low cost, easy-to-install ADS-B Out system that keeps your existing Mode C transponder in place? Garmin’s innovative GDL 82 is the perfect solution. This 978 MHz UAT can be installed between your existing transponder and transponder antenna, so there’s no need for extensive panel work. Also includes a WAAS GPS for total compliance with the FAA’s 2020 ADS-B Out mandate.


Single-entry Squawk Code

The NextGen rules require that your ADS-B “Out” source must be able to squawk the same code as your transponder. GDL 82 will automatically synchronize with your onboard Mode A/C transponder for its squawk code and pressure altitude data and then transmit that data through its own datalink. Not only does this provide a single point of data entry for ADS-B “Out,” but it also allows you to meet the new regulations without the need for expensive control system or transponder upgrades. GDL 82 works in the background to make code entry fast and easy — while it’s helping to make your path to ADS-B compliance as simple, straightforward and cost-effective as it can possibly be.


Want to fly with anonymity?

There are private pilots. And then there are extra-private pilots who want to keep their identities off the traffic screens of other ADS-B “In” equipped aircraft (containing business competitors, perhaps?). GDL 82 and its UAT technology can allow for this extra measure of identity security with “Anonymous mode.” Most conventional ADS-B devices are designed to transmit your aircraft’s ICAO number — a discrete “hex code” assigned by FAA as part of your aircraft’s certificate of registration. If you’re flying VFR, however, you can have GDL 82 set to mask your aircraft’s ID from being transmitted to other receivers whenever your transponder’s squawk code is set to 1200. ATC can still track you with ADS-B precision. But your GDL 82 simply won’t transmit your aircraft’s N-number to other pilots in the airspace.

Includes GDL 82, connector kit, and GPS antenna. Requires installation. 978 MHz systems cannot be used above 18,000 feet or outside the United States.



  • 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)


Buy Now, Pay Later

The GDL-82 is a major investment, and now there's an easy way to make paying for it a little more convenient. For a limited time, PayPal Credit is offering no payments and no interest if paid in full in 6 months on purchases of $99 or more. Just choose the PayPal option at checkout. Learn Here

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4.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
3.0 / 5
3.0 / 5
5.0 / 5
Ease Of Use
5.0 / 5
5.0 / 5
Would You Recommend?
Yes (1)
A box with no instructions.
It’s just been a week since I received it, but since I was asked for a review I’ll qualify this by saying it hasn’t been installed yet. That’s partly because no installation manual was included. Garmin did respond to my email inquiry and very quickly sent me a link to an online installation manual for the GDL82. It’s about 68 pages and much more complicated than the catalog description would make you believe. I really do wish they had sent a printed copy!
December 14, 2019
7 months ago
3 / 5
3 / 5
5 / 5
Ease Of Use
5 / 5
5 / 5
Would You Recommend?
Seems to be doing its job. Passed the verification test on first flight.
So far so good. It is installed and working correctly.
February 19, 2019
1 year ago
Question and Answer
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 27 questions Browse 27 questions and 33 answers
Can the owner install? Or does it need to be installed by an avonics shop?
Jamie K on Apr 1, 2018
BEST ANSWER: I am not a Garmin Rep. That being said, of course the owner can install, and it won't take a lot of effort. If you are semi literate with electrical wiring, all you will need is to first "install the box". It is going to need plus voltage (either 28 vdc or 12 vdc) and a ground. You are also going to need to wire in the USB interface. This is going to be 4 wires to a USB connector. This interface is then used to connect to your personal computer to program the unit. Garmin provides software for this part. There are then two optional wires. One is for a "fault" indication should you desire to have it. I don't have details on this, but it is logical to assume that the "fault" indication would illuminate if the GDL 82 was not reading your transponder data. The next wire hooks to the "anonymous switch" which when turned on, allows the unit to mask your personal identity when you are squawking 1200 VFR code. I consider this the most positive factor for buying UAT technology versus 1030 Extended Squitter transponders. The GDL-82 has the option of including a WAAS GPS. So in this configuration, you will remove the antenna connection on your current mode C and A transponder and and connect it to the GPL 82. Then a short jumper coax from the current transponder to the GDL82. Next a GPS coax from the GPS antenna to the GPLS 82. I know this sounds complicated, but it is not. The beauty of this design is that if your transponder dies, the GPL-82 will still send ADS-B out. If the GDL 82 goes bad, you still have your normal transponder mode A and C out. It is a good choice.,
BOB R on Feb 24, 2018
BEST ANSWER: Garmin's Warranty is for two years. After installation, the warranty card must be completed and submitted to Garmin. For specific warranty questions please contact Garmin support.
Wiring requirements - what kind of wiring gage will this device need for a run of approx. 10-12 feet from the power panel?
A shopper on Jan 20, 2018
BEST ANSWER: Please contact Garmin Support for the wiring requirements.
Will this work with a KT-76A transponder?
Mike S. on Sep 11, 2018
BEST ANSWER: According to Garmin support, YES, the gdl-82 is compatible with a fully functioning KT-76A. The support rep stated that many people have successfully used their KT-76A with the gdl-82.
Who can install this unit?
Mark F on Aug 13, 2018
BEST ANSWER: This unit for certified aircraft must be installed by a certified installer.
If I already have a GPS, do I still to install the GPS antenna that comes with it?
A shopper on Aug 2, 2019
BEST ANSWER: If the antenna is a WAAS antenna it may be able to be used. Please check with your avionics installer. If the antenna is non-WAAS then the included antenna must be installed.
Can I use the same GPS antenna for this as my KLN89?
Spin+5char? on Apr 30, 2019
BEST ANSWER: The antenna will need to be a WAAS capable antenna and the coax cable is can be different. I would check with your avionics shop.
LEO S on Oct 26, 2018
BEST ANSWER: No, this unit is limited to aircraft that fly below 18000 ft as it is UAT 978.
Does the GLD 82 qualify for the $500 rebate?
A shopper on May 24, 2019
BEST ANSWER: Yes it does. I just received my $500 check last week
will this send the information to an i -pad with foreflight?
Richard T on May 29, 2019
BEST ANSWER: No, You would need an ADS-B receiver, Stratus, Sentry, GDL50 to send the information to Foreflight.
On other vendors where this is for sale, it mentions you need to purchase the wiring harness for this setup. Is this true of this item or is the harness included?
Roger M on Dec 16, 2018
BEST ANSWER: It includes the hardware (connectors) to make up the harness but does not include the wires. These are typically provided by the installer.
Does this system have a "network" for traffic display on an iPad/ tablet?
A shopper on Jun 2, 2018
BEST ANSWER: No, this allow the aircraft to be comply withe 2020 mandate with out purchasing a new transponder.
Would this device work in conjunction with the GDL 39 on an Area 796 installed in the same aircraft?
A shopper on Dec 25, 2019
BEST ANSWER: This will provide ADS-B out. It does not directly connect to the 796 or GDL 39.
Can I use this in a G5 setup, I have an ARC RT-359A transponder and a King KX-125 Nav/Comm?
Matt O on Dec 17, 2019
BEST ANSWER: Providing the transponder is a Mode C transponder. It does not interface with the G5 setup.
1090MHz? Will this allow me to fly in and out of the Bahamas?
Dan P on Dec 5, 2019
BEST ANSWER: This unit is 978Mhz. It is for the US only. For 1090Mhz you will need a transponder upgrade/replacement.
Can I use this in a glider which has a Mode C Transponder? If so then how do I get an ADS-Performance Report since most of my soaring is outside the Rule Airspace?
Bob K on Nov 25, 2019
BEST ANSWER: Yes, you can use it in a glider. You should be able to get the report even if not in controlled airspace.

Please go to and search ADS-B.
Can the GDL 82 be installed in helicopters?
A shopper on Sep 25, 2019
BEST ANSWER: Garmin's website does not list it a being available for helicopters. I would recommend contacting Garmin's support at 1.866.739.5687.
Just installed on an RV don’t thank its working. Thank I may need to change the transponder antenna to a blade antenna. Should it be a blade antenna?
A shopper on Aug 15, 2019
BEST ANSWER: I am not sure. I would contact Garmin at 1.866.739.5687.
Can you get this in Australian frequency?
A shopper on Apr 22, 2019
BEST ANSWER: No, it is only a 978 Mhz transmitter.
Can this be used in a Dassault Falcon 20?
Skyraider on Apr 22, 2019
BEST ANSWER: No, the 978 Mhz transmitter is limited to below 18000 ft.
Will this unit work with the f.u.n.k.e. TRT800H-LCD mode S Transponder?
A shopper on Apr 19, 2019
BEST ANSWER: Yes, it will.
CAN H on Mar 23, 2019
BEST ANSWER: Yes, the GDL 82 is compatible with the GTX 330. The 330 may also be upgradable to the 330Es. Please check with your avionics shop.
Will it work on a narco 165 tso transponder?
frank b on Mar 7, 2019
BEST ANSWER: It will work with any mode "C" Transponder.
Will this device allow me to keep and use my current excellent transponder, as well as continue to use my Garmin 796 and all of its features to include charts and weather?
Jerry G on Feb 27, 2019
BEST ANSWER: Yes, it will work.
Any reason this unit cannot be installed in a Canadian registered aircraft?
A shopper on Feb 4, 2019
BEST ANSWER: UAT 978 Is not approved for use outside of the US.
Will this work with g1000?
manolitovlopez m on Feb 4, 2019
BEST ANSWER: Yes, if your transponder is a mode c.
Is there an additional calibration required other than the biennial txpdr check? If my txpdr is current will that suffice?
Dick R on Dec 25, 2018
BEST ANSWER: No, it would be check with the transponder check.
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