Part #:

Model: GNC-355

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Part Number :






  • Slim, all-in-one touchscreen GPS navigator and Comm radio for Part 23 Class I/II aircraft (weighing less than 6,000 lbs) and experimental/amateur-built aircraft
  • GPS navigator with Localizer Performance with Vertical (LPV) approach guidance, complete with a built-in Comm radio
  • The SBAS/WAAS-certified GPS receiver can allow you to fly GPS-guided LPV glidepath instrument approaches down to as low as 200’
  • GNC 355 offers 10 watts of transmission power with 25 kHz frequency channel spacing or 8.33 kHz channel spacing options (GNC 355A)
  • The ADS-B weather link provides in-flight access to animated NEXRAD imagery, METARs, TAFs, winds and temperatures aloft, PIREPs, NOTAMs
  • Built-in 10-watt Comm radio with 25 kHz or optional 8.33 kHz channel spacing (with GNC 355A) plus standby frequency monitoring and automatic frequency identification
  • GNC 355 can provide advisory vertical approach guidance based on a published glidepath angle or a 3-degree approach glideslope from the runway threshold
  • Pairs with select Garmin flight displays, or integrates directly with your existing course deviation indicator (CDI) for cost-effective installation
  • Visualize your entire flight plan — including departures, arrivals, instrument approaches, holding patterns and more — on a rich, dynamic global moving map
  • Wirelessly transfer flight plans and stream weather, traffic, GPS position and backup attitude via built-in Connext
  • GNC 355 automatically displays the station’s identifier right below the frequency
  • Standard 6.25-inch wide by 2-inch tall design
  • Vibrant, colorful and responsive touchscreen display
  • Fully WAAS/SBAS IFR-approach-capable
  • Built-in standby frequency monitoring
  • Interface options include pairing the GNC 355 with a dual-link Garmin Automatic Dependent Surveillance-Broadcast (ADS-B) solution, such as the GTX 345 or GDL® 88
  • Graphical flight plan editing, allowing pilots to edit their flight plan based on an ATC amendment or weather
  • Smart AirspaceTM makes it easier to identify pertinent airspace on the moving map



TSO APPPLIABILITY: C128a; 2C128; C146e Class 3; C157b Category 1; C165a; C169a Class C, E, 4, 6; 2C169a, Class C, E, H1, H2, 4, 6; C195b Category B1, B3, B5, B7 display size: 4.8"(122.5 mm) Diagonal
UNIT Weight: 3.3 lbs. (1.5 kg) display resolution: 732 pixels (W) x 240 pixels (H)
unit bezel height: 2.02" (51.0 mm) unit bezel width: 6.25" (159.0 mm)
maximum altitude: 35,000 ft unit depth with connectors: 11.23" (285 mm) (measured from face of aircraft panel to rear of connector backshells)
input voltage range: 9 VDC-33 VDC MAXIMUM DISPLAY BRIGHTNESS: 260 fL
OPERATING TEMPERATURE : -20° C to 55° C (-4° F to 131° F) BLUETOOTH VERSION: 4.2
NUMBER OF GPS CHANNELS: 15 (12 GPS and 3 GPS/WAAS/SBAS) LAT/LON POSTION ACCURACY:  <1.25 meter RMS horizontal, < 2 meter vertical, with WAAS
MAXIMUM VELOCITY: 1,000 knots (above 60,000 feet) POSITION UPDATE INTERVAL: 0.2 sec (5 Hz)




Part Number: Description:
010-02232-00 GNC-355
010-02232-50 GNC-355
010-02232-51 GNC-355
010-04956-00 GNC-355



- Nav/Comm
Price Condition Status
- GPS/Comm (International)
Price Condition Status
- GPS/Comm (Americas)
Price Condition Status
- Nav/Comm
Price Condition Status

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Garmin has provided Service Advisory 2051 for general recommendations, materials, and supplies to clean and disinfect Garmin products. Otherwise, not following the recommendations could void the warranty.

  • Cleaners containing ammonia will harm the anti-reflective coating on many Garmin aviation display lenses.
  • Disinfectant with a solution of 70% isopropyl alcohol that does not contain ammonia is preferred. Solutions of up to 91% isopropyl alcohol are also acceptable.
  • Clean the display lens using a clean lint-free cloth and a cleaner that is specified as safe for anti-reflective coatings.
  • For other exposed surfaces such as knobs, buttons, and bezels, a damp cloth with soap and water is acceptable.
  • Bleach-based cleaners, ammonia-based cleaners, or other harsh chemicals on any surface are not recommended.
  • Remove all soap/soap residue to prevent buttons and knobs from gumming up or becoming slippery.
  • Many aviation products are not rated as waterproof. Spraying or wetting the units to the extent where moisture could go beyond the exterior surfaces could damage the unit.