Garmin GNX 20 Marine Instrument w/Standard Display - 4

Garmin GNX 20 4″ Standard Marine Instrument Display

The Garmin GNX 20 4" Standard Marine Instrument Display presents connected vessel data through a compact standard marine interface.

4" display fits compact panels.
Standard format supports instrument viewing.
Marine display presents connected data.
GNX 20 identifies the model.
Garmin identifies the manufacturer.

$241.00

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SKU: GRM-GNX20-4 Category: Marine Displays Brand: Garmin

SKU:

GRM-GNX20-4

Description

The Garmin GNX 20 is a compact NMEA 2000 marine instrument display for showing wind, depth, speed, heading, voltage, and navigation data from compatible network sources. Its 4-inch monochrome screen fits a standard instrument panel, while the optically bonded glass and multi-color backlighting keep the display readable in different light. It is a data repeater, not a chartplotter.

The GNX 20 draws 35mA in normal operation and up to 100mA at full brightness, keeping the load low on a 12V NMEA 2000 network. It can be flush mounted or used on a flat panel, and IPX7 protection suits exposed cockpit positions. Because it relies on remote NMEA 2000 data, the boat must already have compatible wind, depth, speed, heading, or engine sources. It does not measure these values by itself.

Key Features

4-inch segmented and dot-matrix LCD – Displays multiple NMEA 2000 data pages in a compact panel.
Seven-color LED backlighting – Lets the crew choose a useful display color for day or night.
NMEA 2000 network connection – Receives compatible wind, depth, speed, heading, and voltage data.
35mA normal and 100mA maximum draw – Keeps the instrument’s network load low.
Flush or flat mounting – Provides installation flexibility for different instrument panels.

Who Is This For?

This NMEA 2000 instrument display suits sailboats, cruisers, offshore center consoles, and luxury sport yachts that need a compact data repeater. It is not ideal for buyers wanting built-in sensors, charts, radar, or sonar imaging.

Compatibility

Confirmed compatibility includes NMEA 2000, compatible remote wind, depth, speed, heading, voltage, and environmental data, plus NMEA 2000 network sensor sources. The supplied information does not identify specific transducers, Garmin radar, autopilot, Raymarine, B&G, Simrad, or NMEA 0183 compatibility. No named incompatible system was provided.

Technical Specifications

Brand: Garmin
Model: GNX 20, 010-01147-00
Display: 4-inch optically bonded monochrome LCD
Data: Boat speed, wind vectors, wind angles, heading, depth, timers, voltage, environmental telemetry
Networking: Native NMEA 2000
Voltage: 12V DC through network drops
Power draw: 35mA operating; 100mA maximum brightness
Water rating: IPX7
Mounting: Flush or flat mount; 90mm cutout
Weight: 0.23kg / 0.50lbs

Warranty & Support

The supplied specifications do not state a warranty term. Confirm current Garmin warranty coverage before purchase.

The GNX 20 is the right choice when a boat needs a small, low-power display for data already available on its NMEA 2000 network. Its trade-off is that it depends entirely on those external sensors and instruments. Choose it as a wind, depth, or engine-data repeater, not as a standalone navigation or fishfinding unit.

Brand	Garmin
Full Model SKU/Code	010-01147-00 (GNX 20)
Country of Origin	Taiwan
Gauge Type	Multi-Function Digital Instrument Dashboard Display Unit
Monitored Parameters	Displays Remote NMEA 2000 Data Streams: Boat Speed, Wind Target Vectors, Apparent/True Wind Angles, Heading, Depth, Navigation Timers, Vessel Voltage, Environmental Telemetry
Data Bus / Protocol Compatibility	Native NMEA 2000 Protocol Bus Communication Node
Engine Brand Compatibility	Universal NMEA 2000 Instrument Array Output Interface Compatibility
Display Technology & Backlighting	Optically Bonded Segmented and Dot-Matrix Monochrome LCD Display with Custom 7-Color LED Backlighting Matrix (Glass-Discharge Style)
Screen Size	4.0" Diagonal Viewing Window Area
Bezel/Housing Diameter	110 mm x 115 mm Standard Square Housing Footprint
Mounting Method / Cutout Size	Front Dash Console Flush Mount System with Rear Clamp Nut or Flat Mount Panels / 90mm Cutout Diameter
Operating Voltage	12 Volts DC Only (Power pulled over local network drops)
Current Draw / NMEA 2000 LEN	Operational Active Current Draw: 35 mA / Full Brightness Max: 100 mA (LEN: 2)
Waterproof Rating	IPX7 Front Panel Facing Waterproof Armor Sealing Standard
Lens Technology	Anti-Fogging Hardened Glass Bonded Window Panel
Material & Bezel Finish	UV-Shielded High-Impact Composite Shell with Interchanging Matte Black and Clean Trim Bezel Profiles
Number of Supportable Engines	Multi-Engine Dynamic Network Monitoring Data Parsing Capabilities via Network Backbone Gateway
Alarm & Alert System	Visual Screen Inverse Flash Warnings and Network Parameter Trigger Notifications
Dry Weight	0.23 kg / 0.50 lbs
Application	Primary dynamic navigation display cluster, custom engine telemetry gauge companion, standalone sailing wind terminal, or master dashboard instrumentation cluster for offshore center consoles, sailboats, and luxury sport yachts (18-50 ft boat lengths)