Item #956031

Garmin GMI 20 Instrument Display

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Garmin GMI 20 Instrument Display

Item # 956031


Perfectly Designed for Power and Sail Vessels. The GMI 20 digital marine instrument display is perfectly designed for both power and sail vessels. Designed to clearly show depth, speed, wind and 100+ marine and vessel param, its large, bright 4" color display with extra large digits is easy to read at a distance and 170 degree viewing angle.

A glass-bonded finish lens on the GMI 20 prevents fogging and increases contrast. Daylight readability is enhanced with a high contrast color scheme. For enhanced night visibility, you have a choice of red/black, green/black or the normal night mode color scheme along with a dimmer control. Screens can be set to auto-scroll, cycling between pages automatically without your having to do a thing. This is especially advantageous to sailors as it allows you to install the unit(s) in a greater variety of locations on the vessel. Default profiles can be customized for powerboat, sailboat, fishing, engine/fuel, plus several other user-specified profiles. Power is supplied by the NMEA 2000 network.

In addition, the GMI 20 also features a dedicated race timer that counts down and counts up, with an internal beeper. Included are 2 trim snap piece cover options which allow you to match the GMI 20 with the new GPSMAP 500/700 series, GPSMAP 8000 Glass Helm series or legacy Garmin chartplotters.


  • Marine instrument display clearly shows depth, speed, wind and 100+ marine and vessel param
  • Large, bright 4" color glass-bonded lens display with anti-glare finish
  • Easy to read from a distance and 170 degree viewing angle
  • Enhanced night time readability with backlight dimmer and full color or new red/black or green/black color schemes
  • Enhanced daylight readability with new high contrast color option


  • Dimensions: 110 x 115 x 30 mm (4.33" x 4.53" x 1.18")
  • Display Size: 4" diagonal
  • Display Resolution: 320 x 240 pixels
  • Display Type: Color QVGA display
  • Weight: 247 g (8.71 oz)
  • Waterproof: IPX7
  • Mounting Options: flat or flush
  • Glass Bonded Display
  • Temperature Range: From 5° to 158°F (from -15° to 70°C)
  • NMEA 0183 Compatible
  • Power Consumption: 3W max
  • Compass Safe Distance: 209 mm (8.25")
  • Auto-On: yes
  • User Profiles: yes
  • Backlight: yes


  • GMI 20
  • Black trim piece snap cover
  • Protective cover
  • Flush mount gasket and hardware
  • NMEA 2000 T-connector
  • NMEA 2000 drop cable
  • Documentation

Owner's Manual (2.11 MB)

Installation Instructions

Flush Mount Template


This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm.

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Part Numbers for Garmin GMI 20 Instrument Display

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