GNX™ 20 Display - 4"

Yes, the GNX 20 screen is specifically designed for excellent readability in daylight. It features a large 4-inch LCD screen with black digits on a high-contrast light background. Additionally, its glass is treated with an anti-glare finish to minimize reflections and ensure optimal visibility even in direct sunlight.

The GNX 20 display is very versatile and can display over 50 different navigation parameters from your NMEA 2000 network. Common data includes:

Basic Data: Speed (over ground and water), depth, heading.Wind Data: Apparent and true wind (speed and angle).GPS Data: Position, COG (Course Over Ground), SOG (Speed Over Ground).Engine Data: RPM, temperature, pressure (if connected to the network).Navigation Information: Waypoint data, cross-track error (XTE).

The main difference between the GNX 20 and GNX 21 lies in the type of LCD display:

GNX 20: Uses a standard LCD screen with large black digits on a white or colored background. This is the most common display.GNX 21: Uses an inverted (or negative) LCD screen with white or colored digits on a black background.The choice depends on personal preference and the lighting conditions at your helm.

Yes, the GNX 20 display is designed for the marine environment and is waterproof to IPX7 standard. This means it can withstand accidental immersion in 1 meter of water for 30 minutes.

The GNX 20 is compatible with the following networks:

NMEA 2000: This is its primary connectivity. It connects directly to an NMEA 2000 network to receive and display data from all compatible sensors.NMEA 0183: It can receive data from an NMEA 0183 device, but cannot transmit it (receive only).Nexus: It is also compatible with Nexus instrument systems through the use of a GND 10 gateway (sold separately).

Yes, it is possible to connect the GNX 20 display to a Nexus instrument network. To do this, you need to use the Garmin GND 10 gateway (sold separately), which bridges the Nexus network and the NMEA 2000 network on which the GNX 20 operates.

The GNX 20 display is designed for flush mounting for a clean, integrated finish. The kit includes the waterproof gasket and necessary mounting hardware. It is important to cut the dashboard according to the provided mounting template for a perfect fit.

The GNX 20 display box contains everything needed for installation on an existing NMEA 2000 network:

The GNX 20 displayA snap-on bezelA protective coverA gasket and hardware for flush mountingAn NMEA 2000 T-connectorAn NMEA 2000 drop cableProduct documentation

Yes, if your engine is equipped with a compatible NMEA 2000 gateway, the GNX 20 can display a variety of engine data such as RPM, temperature, oil pressure, and fuel consumption. The display will simply read the data available on the network.

Yes, the GNX 20 is fully customizable. You can configure up to 5 different display profiles, including dedicated profiles (sail, power) and a user profile. Within each profile, you can choose which data pages to display and the layout of information on each page (one, two, or three data fields).

Yes, the GNX 20 has an "Auto Power" function. When this option is enabled in the settings, the display will automatically turn on as soon as the NMEA 2000 network it is connected to is powered up.

The GNX 20 display operates on a standard NMEA 2000 network. The required input voltage for the network must be between 9 and 16 Vdc. The maximum voltage supported by the unit itself is 32 Vdc.

Yes, for optimal readability of the GNX 20's standard LCD screen, Garmin recommends installing it in a location where the viewing angle is less than 45 degrees. Beyond that, the screen contrast may decrease.

Yes, the GNX 20 has a network sharing function. You can configure it to synchronize its backlight color and intensity settings with other compatible Garmin displays and chartplotters on the same NMEA 2000 network. This allows for a consistent navigation console, day and night.

Yes, absolutely. The GNX 20 is NMEA 2000 certified. This means it can display data from any sensor (depth sounder, anemometer, GPS, etc.) from another brand, provided that the sensor is also NMEA 2000 certified.

The GNX 20 display is a 4-inch navigation instrument designed to offload critical data from your network without cluttering your main screens. It allows you to view essential information such as speed, depth, and wind.

This display can receive and show various data from your sensors, including:

Speed (SOG, Bsp, etc.)Water depthWind data (speed and angle)Engine parametersBattery statusHeading direction

Yes, the GNX 20 display has an IPX7 waterproof rating, meaning it is designed to withstand temporary immersion.

The device has a 4-inch (approximately 10 cm) screen for clear navigation data display.

The display is protected by a glass lens with an anti-reflective finish, improving visibility even in strong light.

The instrument is designed to operate in a variety of marine conditions, with an operating temperature range from -15°C to 70°C.

Yes, the device offers several profiles to suit your use case:

Powerboat: for powerboats.Sail Cruise: for cruising sailboats.Sail Race: for regattas.Custom: for a custom setup.

The display weighs 247 g without its protective cover and 283 g when equipped with the cover.

Yes, the GNX 20 display natively communicates with sensors and connected devices via an NMEA 2000 network.

Yes, it is possible to receive data from a NMEA 0183 device by using an optional data cable (not included).

Yes, displaying data from Nexus instruments and sensors is possible using a GND 10 box (sold separately).

For the NMEA 2000 network, the input voltage must be between 9 and 16 Vdc.

Installation can be done in two ways: flat mount or flush mount in your dashboard.

Yes, a mounting template is included in the product box to help you make a precise cut for your bracket.

Yes, to ensure optimal visibility, the viewing angle must not exceed 45° for the standard model. Note that screen color inversion may occur if the angle is too steep.

To prevent corrosion of metal contacts, it is strongly recommended to cover unused connectors with the weatherproof caps supplied with the device.

Yes. The product is shipped with everything needed, including a gasket and template, to ensure a clean and watertight flush-mount installation.

If you install the device in fiberglass, use a countersink drill bit to drill only the top gelcoat layer. This will prevent cracks when tightening the screws.