The Garmin GNX 20 Instrument Display is a compact, glass-bonded instrument that brings critical vessel data to life with high-contrast digits. Designed for both sail and power boating, it delivers day- and night-readability and easy NMEA 2000 connectivity for a streamlined helm setup.
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Display: High-contrast glass-bonded display with anti-glare lens; digits scalable up to 36 mm
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Display type: Standard LCD, monochrome
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Backlighting: 7 customizable backlight colors to match your helm; color backlight is not visible in daylight
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Display configurations: 5 display configurations plus gauge and graph modes to show depth, speed, wind, and 50+ marine and boat parameters
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User profiles: Fully customizable user profiles tailored for sail or power boating
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Auto-scroll: Auto-scroll feature rotates through data screens for hands-free operation
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Power: Low power consumption at 25 mA (0.35 W day / 0.40 W night with backlight)
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Durability: Glass-bonded display with anti-glare coating for rugged durability and reliable readability
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Connectivity: NMEA 2000 compatible with included T-connector and drop cable for easy network integration
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Mounting: Flexible mounting with a low-profile flush mount or an optional flat mount for a clean glass-helm look
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Size & weight: 110 x 115 x 30 mm; display 3.3" x 2.4" (4.0" diagonal); weight 230 g
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Water & temperature: IPX7 water rating; operating temperature range 5° to 158°F (-15° to 70°C)
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In the box: GNX 20 instrument; trim piece snap cover (2); flush mount gasket and hardware; NMEA 2000 T-connector; NMEA 2000 drop cable; installation instructions
Upgrade your helm with the GNX 20 for fast, decisive readings that keep you in control on every voyage. Its combination of advanced display technology, low power draw, and flexible mounting makes it a practical glass-helm solution for cruising, fishing, and competitive sailing alike. With customizable data views, day- and night-readability, and easy NMEA 2000 integration, this instrument delivers essential boat metrics—depth, speed, wind, and more—at a glance, so you can focus on the water ahead.
| General |
| PHYSICAL DIMENSIONS |
110 x 115 x 30 mm (4.33" x 4.53" x 1.18") |
| DISPLAY SIZE |
(3.3" x 2.4"; 4.0" diagonal) |
| DISPLAY TYPE |
Standard LCD, monochrome |
| WEIGHT |
230 g (8 oz) |
| WATER RATING |
IPX7 |
| MOUNTING OPTIONS |
Flat or Flush |
| POWER CONSUMPTION |
0.35 W (day); 0.4 W (night) |
| GLASS BONDED DISPLAY |
Yes |
| TEMPERATURE RANGE |
From 5° to 158°F (from -15° to 70°C) |
| Electrical |
| COMPASS-SAFE DISTANCE |
209 mm (8.25 in.) |
| Instrument Features |
| AUTO-ON |
Yes |
| USER PROFILES |
Yes |
