The Garmin GNX 20 is a 4" marine instrument built around a first-of-its-kind glass-bonded hybrid LCD that combines directly driven segments with a dot-matrix field for crisp graphical readouts. High-contrast black digits scale up to 36 mm tall and remain readable in full sun, at dusk, or after dark. NMEA 2000 connectivity puts over 50 vessel parameters at a glance, while ultra-low power draw makes it a natural fit for sailboats running without a generator.

Easy-to-Read Display

The hybrid display delivers large digits scalable to 36 mm with excellent clarity in direct sunlight or low-light conditions. The dot-matrix section adds graphical data and supplemental information alongside the primary readout.

Glass-Bonded, Anti-Glare Lens

A glass-bonded construction eliminates the air gap that causes fogging, and the anti-glare lens coating keeps visibility high across all lighting conditions.

Customizable Color Backlight

Select from 7 preset backlight colors or dial in a fully custom color to optimize screen readability for your environment and preference.

Customizable User Profiles

Five display configurations — single, dual, and triple function, plus gauge and graph modes — can be tailored to sail or power boating profiles, letting you surface the wind, depth, speed, and vessel data that matters most.

Auto Scroll

An auto-scroll feature cycles through data pages at a user-set interval, keeping information rotating hands-free while underway.

Low Power Consumption

Drawing just 25 mA (350 mW with no backlight / 400 mW at mid-level backlight), the GNX 20 is engineered for extended sailing without relying on a motor or generator to keep batteries topped up.

NMEA 2000 / NMEA 0183 Compatible

Pull GPS speed, water depth and temperature, wind direction, wind speed, and 50+ additional parameters directly from the NMEA 2000 bus. An optional 7-pin bare-wire power/data cable adds NMEA 0183 device support.

Mounting Flexibility

Installs with the included low-profile flush mount or an optional flat mount for a clean glass helm appearance.

Specifications:

• Display size: 4" standard LCD
• Display type: Glass-bonded hybrid LCD — directly driven segments plus dot-matrix field
• Digit height: Scalable up to 36 mm
• Backlight colors: 7 customizable colors (custom color creation supported)
• Display configurations: 5 (single, dual, triple function, gauge, graph)
• Parameters supported: 50+ marine and vessel parameters via NMEA 2000
• Network compatibility: NMEA 2000; NMEA 0183 via optional 7-pin bare-wire cable
• Power consumption: 25 mA / 350 mW (no backlight) / 400 mW (mid-level backlight)
• Anti-glare lens: Yes
• Fog resistance: Yes — glass-bonded construction
• Auto-scroll: Yes, user-configurable speed
• Mounting options: Included low-profile flush mount; optional flat mount

In the Box:

• GNX 20 instrument
• Trim piece snap cover
• Protective cover
• Flush mount gasket and hardware
• NMEA 2000 T-connector
• NMEA 2000 drop cable
• Installation instructions
• Documentation

Note: This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.