GWX 70 Weather radar



The GWX 70 has a high-sensitivity receiver and digital signal processing combined with an all solid-state transmitter making it one of the most reliable weather radars currently available on the market. Able to give you full color storm cell tracking on compatible Garmin multifunction displays like the GTN 750, G500/G600, G1000, GMX 200 and the GMX 20.

“Altitude Compensated Tilt” allows you to set the tilt angle ones and then the radar will automatically compensate for climbs and descents reducing the workload needed from the pilot during the flight.

The GWX 70 offers pilot-adjustable horizontal scan angles of up to 120 degrees and Ground Mapping mode allows you to use the GWX 70 to scan terrain features for visual navigation. The system also includes a vertical scanning function to analyze storm tops, gradients and cell buildup activity at various altitudes.


Operational mode: Weather (WX): Green, Yellow, Red (Magenta is reserved for display of the optional turbulence detection function); Ground Mapping (MAP): Cyan, Yellow, Magenta, Blue

Display ranges: Selectable 2.5, 5, 10, 20, 40, 80, 160, and 320 nm (MX 20; GMX 200). Selectable 2.5, 5, 10, 20, 40, 60, 80, 100, 120, 160, 240 and 320 nm (G1000, G600/G500, GTN 750 series). NOTE: Software updates for radar display are required to take advantage of all the advanced capabilities of the GWX 70 – such as Doppler turbulence detection and ground clutter suppression. These features may not be available or supported on all products. Check with your Garmin dealer for compatibility options.

Performance index:

  • 18-Inch Antenna: 227 dB
  • 12-Inch Antenna: 221 dB
  • 10-Inch Antenna: 218 dB

Weather avoidance:

  • 18-Inch Antenna: 320 nm max.
  • 12-Inch Antenna: 320 nm max.
  • 10-Inch Antenna: 285 nm max.

RX sensitivity: -126 dBm MDS

Manual gain: +12 to – 64 dB (G1000; G600/G500; GTN 750 series); +3.5 to – 28 dB (MX 20; GMX 200)

Antenna bandwidth:

  • 18-Inch Antenna: 5.3 degrees
  • 12-Inch Antenna: 7.8 degrees
  • 10-Inch Antenna: 9.0 degrees

Horizontal scan angle: Pilot adjustable; 20, 40, 60 or 120 degrees (G1000; G600/G500; GTN 750 series); 20 or 120 degrees (MX 20; GMX 200)

Scan centerline: Pilot adjustable

Scan rate: 12 looks per minute

Manual tilt: +/- 15 degrees

Vertical scan angle: 60 degrees (G1000; G600/G500; GTN 750 series); 10 – 60 degrees (MX 20, GMX 200)


Mechanical Size: Width: 8.0 in. (20.3 cm.) diameter at base; Depth: 6.3 in. (16.0 cm.); Antenna: 10 in. or 12 in. diameter flat-plate

Unit Weight:

  • 18-Inch Antenna: 12.7 lbs. (4.31 kg)
  • 12-Inch Antenna: 9.5 lbs. (4.31 kg)
  • 10-Inch Antenna: 9.3 lbs. (4.22 kg)

Environmental: Operating temperature range: -55 Degrees C to +70 Degrees C; Humidity: 95% non-condensing Altitude Range: -1,500 feet to 55,000 feet; TSO Compliance: C63d, Class 7 Environmental Category: RTCA DO-160F

Electrical: Power Requirements:
14/28 Vdc; 2.0amps
Transmitter Power: 40 Watts nominal, 36 Watts minimum
Output Frequency Range: X-Band (9.3 to 9.5 GHz)
Pulse Width: 1.6, 3.2, 6.4 or 13.6 Microseconds
STC Logic: Effective to 80 nm
Extended STC: 80 nm to 320 nm
(Modifies targets from end of STC to maximum range)
Stabilization: +/- 30 degrees
combined pitch, roll and manual tilt
Max. Altitude: 55,000 feet (unpressurized)
Target Alert: (G1000, G600/ G500 and GTN 750 series only) Annunciates targets (between 80 and 320 nm) that are beyond displayed range on radar screen
Interface: Garmin HSDB (G1000, G600/G500 and GTN 750 installations); ARINC 429/453 (MX 20, GMX 200 installations)

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