GMN 010-02486-50

GNC 255A VHF NAV/COM/VOR/ILS/GS Radio, from Garmin, gmn-010-02486-50


Due October
Item Qualifies for Free Ground Freight (48 States) on Orders Over $350

Garmin GNC 255A Series VHF NAV/COM/VOR/ILS/GS 10W Radio


  • Reverse Database Look-up
  • COM Monitor Function
  • Automatically Stores 20 Most Recent Frequencies
  • Built-in, Voice Activated Two-Place Intercom
  • Pairs Nicely with G500/G600 Models

Garmin is pleased to announce a new series of VHF NAV/COM radios, the GTR and GNC series. As the replacement products for the popular SL30 and SL40 models, the GTR series COM transceivers and GNC series NAV/COM radios include a breadth of new features to reduce pilot workload, while also offering an affordable solution to meet the requirements of the 8.33 kHz channel spacing mandate recently enacted by the European Union under the Single European Sky (SES) initiative. These products have truly reinvented the stand-alone aviation COM radio with novel features like reverse database look-up and the COM monitor function, which bring new efficiencies to cockpit radio management.

As compact as it is capable, the GNC 255 can bring powerful Nav/Comm capabilities to virtually any cockpit. Not only does the GNC 255 meet the basic needs of most pilots – including adhering to new airspace requirements in Europe – it also features a number of advanced features that save you time and effort. It also contains an internal VOR/LOC converter and 40-channel glideslope receiver.

Reduce Your Workload

In addition to traditional Nav/Comm features, the GNC 255 incorporates a number of functions that can save you time and effort. Provide the GNC 255 with an airport or navaid identifier and it will automatically find all available frequencies (and vice versa) thanks to a built-in, updateable database. With a compatible GPS input, the device will find the nearest airport to your location and easily access its weather, center and FSS frequencies. It will also allow you to easily pull up your most frequently or most recently used frequencies. The device even automatically decodes a station’s Morse code to provide a positive identification – no audible verification required. when manually tuning a frequency, the reverse lookup function will automatically provide the navaid and/or airport identifier.

You can easily view distance, time and speed on the device’s bright display when you install it with a compatible GPS source like our GTN or GNS series avionics. And when paired with a G500, G500H, G600 or G3X flight display, it allows for the display of VOR and ILS indications on the PFD and can follow autopilot commands. Alternatively, you can use an HSI or CDI like our MD200-306, which has been specifically designed to work with the GNC 255.

Listen to 2 Frequencies with 1 Comm

With the standby frequency-monitoring feature in the GNC 255, you won’t have to worry about missing an ATC call or other critical transmission. The GNC 255 allows you to listen to ATIS without leaving your assigned ATC channel. Swapping your active and standby frequencies is done with a single touch of a button. Pressing and holding frequency transfer key will automatically set the emergency frequency as your active radio. You can use the built-in timer to assist with approaches, holds and other assigned maneuvers.


  • Bezel Height: 1.65 in (41.9 mm)
  • Bezel Width: 6.25 in (158.8 mm)
  • Rack Height (Dimple-to-Dimple): 1.72 in (43.82 mm)
  • Rack Width: 6.30 in (160.02 mm)
  • Depth Behind Panel with Connectors: 11.23 in
  • GTR 225: Weight (Unit Only) 2.36 lbs (1.07 kg)
  • GNC 255: Weight (Unit Only) 3.02 lbs (1.37 kg)
  • GTR 225: (Installed with rack and connectors) 3.06 lbs (1.39 kg)
  • GNC 255: (Installed with rack and connectors) 3.96 lbs (1.80 kg)


  • Operating Temperature Range: -20 C to +55 C
  • Altitude Range: -1,500 ft to 55,000 ft
  • Input Voltage Range: (COM Connector) 9 to 33 VDC
  • Input Voltage Range: (NAV Connector) 9 to 33 VDC
  • Display Size: Width: 3.46” (88.0mm) - Height: 0.843” (21.4mm)
  • Active Area: Width: 2.95” (74.98mm) - Height: 0.486” (12.36mm)
  • Resolution: 200 x 33 pixels
  • Viewing Angle: Left: 45° - Right: 45° - Up: 10° - Down: 30°