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Garmin GDL-39

ADS-B Traffic & Weather

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Garmin - Discontinued - 010-11689-0X
From: $499.00



  • Apple iPad running Garmin Pilot™
  • Apple iPad running ForeFlight™
  • Android Tablet running Garmin Pilot
  • Garmin aera 795 / 796
  • Garmin aera 660
  • Garmin aera 500 / 510 / 550 / 560
  • Garmin GPSMAP 695 / 696
  • Garmin GPSMAP 396 / 495 / 496

Start receiving ADS-B traffic, subscription-free weather on your Garmin aviation portable or mobile device with the GDL 39 ADS-B receiver. When using Garmin Pilot on your mobile device, the GDL 39 can provide highly accurate WAAS GPS data as well.

Comprehensive Weather

Access Comprehensive Aviation Weather

The GDL 39 features ADS-B “In” datalink technology that allows it to receive subscription-free Flight Information Service-Broadcast (FIS-B) weather information over the FAA’s 978 MHz Universal Access Transceiver (UAT) uplink. Easily access graphical NEXRAD radar, METARs, TAFs, winds and temperatures aloft, PIREPs, NOTAMs and more right on your compatible Garmin aviation portable or through the Garmin Pilot app on your iPad® or Android device.¹

Spot Potential Traffic Threats

The GDL 39 can receive ADS-B position reports directly from other aircraft in your vicinity. Because the FAA permits ADS-B broadcasts on 2 frequencies (978 UAT and 1090 ES), the GDL 39 contains both receivers so you can see a comprehensive view of all ADS-B “Out” equipped targets. The compatible display² will alert you by announcing traffic targets both audibly and visually. Spoken audio alerts announce “Traffic, Traffic” to get you looking right away.

ADS-B “In” technology also allows the GDL 39 to receive Traffic Information Service-Broadcast (TIS-B) information. TIS-B allows you to view the same dynamic traffic picture that ATC ground controllers are seeing when you're either participating with an ADS-B "Out" solution or within a certain range of another ADS-B "Out" participating aircraft when within a service area. Garmin correlation technology automatically displays the highest-integrity traffic data from multiple sources, preventing ghost or duplicate targets.

Garmin Pilot App

Take Advantage of Advanced Display Capabilities

With the Garmin Pilot app on your mobile device, you can receive advanced traffic display features like TargetTrend™ relative motion tracking that provides a faster, more intuitive way of judging target trajectories and closure rates in relation to your aircraft's position.

Get More Accurate GPS

The GDL 39 can provide highly accurate WAAS GPS location information to your mobile device – like an iPad – using Bluetooth® technology. This provides your device with the precision you’d expect from Garmin’s aviation-grade navigation devices, updating at a rate of up to 5 times per second depending on the capability of the device used.

Go Wireless

aera 796

With built-in Bluetooth capability, the GDL 39 can wirelessly send the data it collects to compatible apps like Garmin Pilot, and soon on the aera® 795/796. The GDL 39 is capable of simultaneously providing wireless data to 2 devices while hardwired to a third. As opposed to using a WiFi link, Bluetooth lets you stay connected while on the ground so you can continually receive the latest weather reports as long as you have a data connection – no manual switching of networks required. Just set it up once and it will automatically remember and pair with your mobile device the next time you hop in the cockpit.

Should wireless connectivity not be an option with your device, a wiring harness is included with your GDL 39. The device can go up to 4 hours between charges with an optional battery, and a cigarette lighter adapter comes included for onboard power. As technologies continue to develop, software updates will be available through your Garmin aviation portable via Garmin Pilot and a separate utility app on your mobile device using the Bluetooth connection.

¹Not all FIS-B products may be available across all devices. Check your Pilot's Guide for specifics about which products are available on your device.

²Both the audible traffic alerting feature and TargetTrend™ require compatible displays. Please check the Pilot’s Guide for specific capabilities available on your display.

Note: The GDL 39 is a non-certified receive-only product. It does not provide ADS-B “Out” capability to satisfy FAA mandate requirements.

Compatible displays for the GDL 39 include the GPSMAP 396, GPSMAP 496/495, GPSMAP 696/695, G3X, aera 500 series, aera 796/795 and select Garmin Pilot app compatible devices (Feature support varies based on the device, see table below for complete information).

Display Interface Summary
Display Traffic FIS-B (Wx) Connection Traffic Protocol
GPSMAP 39X 8 Targets No RS-232 Garmin 330 TIS
GPSMAP 49X 8 Targets No RS-232 Garmin 330 TIS
GPSMAP 69X 30 Targets Yes RS-232 Compressed GDL88  
GDU37X 30 Targets Yes RS-232 Compressed GDL88  
aera 5XX 30 Targets Yes RS-232 Compressed GDL88  
aera 79X 30 Targets Yes Bluetooth /   RS-232 Compressed GDL88  
Garmin Pilot (app) 30 Targets Yes Bluetooth Compressed GDL88  


  • Unit dimensions, WxHxD: 3.5" x 1.9" x 6.0" (8.89 x 4.83 x 15.24 cm)
  • Weight: 0.48 lb (0.22 kg)
  • Operating temperature: 20°C to +60°C
  • Operating altitude: To 55,000 ft
  • Power input: 10 to 32 VDC, 3.5 W max.
  • Battery charge power: 4.5 W max
  • Total power while charging: 8.0 W max

Optional Battery Assembly

  • Type: Lithium Ion Rechargeable Battery
  • Unit dimensions, WxHxD: 3.8" x 0.9" x 6.4" (9.65 x 2.29 x 16.26 cm)
  • Output voltage: 7.4 VDC
  • Charging voltage: 10-32 VDC
  • Charge temperature: 0° C to 40°C (32°F to 104° F); Note: Unit may not charge at extreme temperatures (below 32° F or above 90° F)
  • Operating temperature: -20° C to +60°C (-4°F to +140° F)
  • Typical battery operating time: up to 4 hours
  • GDL-39 portable ADS-B datalink with antenna
  • GPS Interface cable (or DC cable for iPad version)
  • Battery (optional)
  • Pilot's guide
  • Mounting bracket
  • Carry case
  • Suction cup for cable placement
  • Free trial of Garmin Pilot

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GDL-39 Product Commentary

Sarasota Avionics This solution enables the features of subscription-free ADS-B “In” weather for portable GPS & iPad users. The one-time cost is roughly equal to a one-year subscription-based service. Weather radar imaging is clear and accurate. It’s a great way to add weather to your portable device without the commitment of subscription.

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