GNC 420W

Part Number: 010-00410-01
Estimated availability is 1 – 3 business days.
Find a Dealer


The GNC 420W adds a TSO-certified 2280-channel comm transceiver to the GPS 400W’s WAAS navigation capabilities and color display, creating the first color GPS/comm in the industry. GNC 420W has all of the IFR GPS and comm features of the GNS 430W minus the VOR, ILS or glideslope capability you may already have in your aircraft.

Save Space with Built-in Comm

The reliable GNC 420W delivers clear communication from its 10-watt, 2280-channel VHF transceiver. In the alternative, GNC 420AW features a high power 16-watt transmitter for high altitude turbine aircraft. With the 420W's frequency nomination feature, you can easily load your next com frequency into standby with the touch of a button.

Fly WAAS Approaches

GNC 420W comes with built-in WAAS navigation capabilities. It is approved to fly LPV “glideslope” approaches without reference to ground-based navaids of any kind. Featuring an advanced 15-channel receiver capable of five position updates per second, GNC 420W meets the FAA's stringent TSO C146a standards for WAAS "sole means" navigation — providing vertical and lateral approach guidance into thousands of U.S. airports previously inaccessible in IFR conditions.

Get High-Resolution Mapping

GNC 420W's 4-inch high-contrast display with brilliant colors makes it easy to read and interpret pilot-critical information. Effective use of color makes it easy to see your position relative to ground features, chart data, navaids, flight plan routings, approach procedures and more. Conveniently scan information from wide viewing angles, even in direct sunlight.

Enhance Situational Awareness

GNC 420W seamlessly integrates built-in terrain and navigation databases, providing a clear, concise picture of where you are and where you’re heading. The 420W's huge Jeppesen® database, updated with front-loading data cards, contains location reference for all airports, VORs, NDBs, Intersections, Flight Service Stations, published approaches, SIDs/STARs, Special Use Airspace and geopolitical boundaries. A detailed basemap clearly shows airports, cities, highways, railroads, rivers, lakes, coastlines and more. Using information from the built-in terrain and U.S. obstacles databases, the 420W displays color coding to graphically alert you when proximity conflicts loom ahead.

GNC 420W: Big-picture situational awareness

WAAS enabled Service Alert


PDF Download detailed specs

Physical & Performance

Physical dimensions 6.25"W x 2.65"H x 11.0"D (15.9 x 6.7 x 27.9 cm)
Display size, WxH 3.3"W x 1.8"H (8.4 x 4.6 cm)
Display resolution, WxH 240 x 128 pixels
Display type 8 color DSTN LCD
Weight 5.8 lbs (2.6 kg)
SBAS/WAAS receiver 15 channel
SiriusXM™ Weather & Radio compatible
Voltage range 14-28
Transmit power 10 watts minimum; 16 watts minimum (GNC 420A)
Built-in VHF Comm yes, 8.33/25 kHz channel spacing
Traffic Information Services (TIS) alerts compatible

Maps & Memory

Waypoints/favorites/locations 1,000


Navigation database coverage areas Americas, International or Worldwide
Preloaded Terrain database
Preloaded Obstacle database
Flight plans 20 reversible; up to 31 waypoints each

GPS/Nav/Comm Features

Fly SBAS/WAAS approaches
Front-loading datacards (conveniently update database information)

In the Box

  • GNC 420W (10 watt) or 420AW (16 watt) receiver, TSO-certified to C146a, GAMMA 3
  • Basemap: Worldwide Land
  • Jeppesen datacard
  • TAW/Terrain datacard
  • TSO GPS antenna
  • Installation kit
  • Pilot’s guide
  • Quick reference guide

Package contents may vary per version. See your local dealer for more information.