GARMIN GNC 255  Series TSO Panel-Mounted NAV/COMM Radios
  • GARMIN GNC 255  Series TSO Panel-Mounted NAV/COMM Radios

GARMIN® GNC™ 255 Series TSO'd Panel-Mounted NAV/COMM Radios SKU: GRMN-NAV/COMM-GNC255

The GARMIN® GTR series COMM TSO'd panel mounted transceivers (please see separate presentation) together with the GARMIN® GNC series NAV/COMM radios are replacement products for the popular SL30 and SL40 models. They include new features to reduce pilot workload, while also offering an affordable solution to meet the requirements of the 8.33 kHz channel spacing European Union mandate under the Single European Sky (SES) initiative. They are more powerful than their SL-series predecessors with 10- or 16-Watt transmit power available versions. 

The GARMIN® GNC series NAV/COMM radios are offered with either a 10 W (GNC 255A) or 16W (GNC 255B) COMM featuring a 25 kHz or 8.33 kHz spacing. Both come with a an internal VOR/LOC converter, a 40-channel glideslope (GS) receiver and include the rack, connector kit, and back plate. They are offered as units only or as kits with a 4ft harness to AUDIO Panel.  If purchased with the 4ft harness, they can only be used  in experimental aircraft.

Mfr. P/N & Title

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As compact as it is capable, the GARMIN® 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.

The GNC 255 is available in 2 versions to fit your needs. Each version comes with 25 kHz frequency channel spacing and 8.33 kHz channel spacing to meet the impending Single European Sky mandate that all aircraft in Europe will need to operate with by 2018. The GNC 255 is available with either 10 W or 16 W of transmitter output, letting you find the right balance of power and price. It includes a 2-place intercom that’s ideal for 2-seat aircraft; no additional hardware is required to communicate with your passenger. It also contains an internal VOR/LOC converter and a 40 channel glidescope receiver. Plus, remote frequency flip-flop capability can help in demanding operating environments like helicopters, letting pilots keep their hands on the controls.

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. You'll have the confidence to know you're talking to the right controller every time. The Nav/Comm's database technology also allows you to quickly 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 aural decoding required.

The GNC 255 will provide distance, time and speed when installed with a compatible GPS source like our GTN or GNS series avionics. All information is displayed on a bright sunlight-readable display so you can quickly read it all at a glance. 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.

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.

Product Features & Specifications:

200 channel Nav with VOR/localiser and glideslope receiver

Reverse frequency lookup based navaid or airport ID

Automatically decodes morse code station identifiers

1-touch emergency channel tuning

Warranty: 24 months 

Certification: TSO C169a (transmitting and receiving), TSO C128a (stuck mic), FAA Export 8130-3

Transmit power: 10 W (GNC255A) or 16 W (GNC255B) Comm

Communication channels: 760 with 25 kHz spacing; 2280 channels with 8.33 kHz spacing

Frequency range: 118.000 to 136.992 MHz (with 8.33 kHz spacing)

Power Source: 14 or 28 volt system

Input voltage range: 9 to 33 VDC

Operating temperature range: -20 to +55 C 

Dimensions: 1.65”H x 6.25”W x 10.4”D (4.19 x 15.88 x 26.42 cm)

Weight: 3.02 lbs (1.37 kg) unit only; 3.46 lbs (1.57 kg) with mounting rack

Depth: 11.23 inches (28.52 cm) behind panel, including mounting rack and connectors

Product includes: GNC 255 Nav/Comm unit, Installation kit, Manual

Additional Information:

Intercom: Integrated intercom is is a basic intercom. For a stereo option or 3.5mm input an external intercom is needed.

Installation tray and wiring harness can be ordered with the unit or separately if needed.

CDI Compatibility: As per Garmin GNC 255 NAV/COMMS are compatible with the Bendix King indicators like KI-209 KI-209 GS/LOC CDI and KI-206 VOR/ILS indicator. For an installation of a new glideslope and LOC/VOR CDI receiver the GI 106A is recommended.

Compatibility with Portable GARMIN® GPS: As per Garmin, GNC 255 NAV/COMMS can interface with portable  GARMIN® GPS like 695/696 or Aera 500 series with the use of Garmin power/data cable part.

GRMN-GNC255A-ASA-00159-CU

Data sheet

Certification/Approval
FAA Technical Standard Order (TSO)
Taric
8517620010 Radio-telegraphic or radio-telephonic apparatus, for use in civil aircraft
Unit of Measurement (UOM) / Sale
Each (ea.)

Specific References

taric
8517620010
New