GARMIN GNX21 Marine Instrument

Displays of the Garmin GNX21 (depending on the connected sensor)

• Wind data (true wind direction, true wind speed, wind angle, wind speed)
• Ambient data (air pressure, humidity, temperature)
• Position data (position, course, trip distance, date and time via GPS)
• Compass data
• Speed through the water
• Water temperature
• Water depth
• Distance to Waypoint
• Rudder position
• Course offset

Marine instrument with inverted 4-inch LCD

• Large, easy-to-read white or colour digits on a black background for high visibility in low-light or darkness; choose from 7 customisable backlight colours
• Glass-bonded display with anti-glare lens prevents fogging
• Fully customisable user profiles for sail or power boating to display most important marine and vessel data
• Low power consumption (25 mA) with 350 mW (no backlight)/400 mW (mid-level backlight)
• 5 display configurations plus gauge and graph mode to display depth, speed, wind and 50+ marine and boat parameters

The GNX 21 marine instrument features an easy-to-read display with white or colour digits on a black background. It allows you to easily read depth, speed, wind and 50-plus marine and boat parameters. Its glass-bonded display with anti-glare lens coating provides excellent daytime and nighttime readability with high-contrast digits scalable up to 36 mm.

The GNX 21 is the first glass-bonded marine instrument with a combination of directly driven LCD segments and a dot-matrix field to display graphical information. Its low power consumption — (25 mA) with 350 mW (no backlight)/400 mW (mid-level backlight) — is perfect for use on sailboats, and provides a valuable instrument for cruising and fishing. Fully customizable user profiles display wind, depth and speed data. Plus, the GNX 21 includes an auto-scroll feature that rotates through data screens for hands-free operation. It can be installed with the included low profile flush mount or an optional flat mount for the ultimate glass helm solution and custom look for your boat.

Easy-to-read Display
Unique high-contrast hybrid display features large, easy-to-read digits scalable up to 36 mm tall. Offers excellent clarity in direct sunlight, at dusk, or at night. The dot-matrix section can show additional details and/or graphical information.

Glass-bonded Display
Glass-bonded display helps prevent fogging, and the anti-glare lens finish increases visibility.

Customisable Colour Digits
Choose from 7 different backlight colours, or even create a customised colour, to achieve the screen that provides optimum readability for you. Fully customisable user profiles allow you to choose from 5 available display configurations for sailboat or powerboat user-profiles: single, dual and triple function, plus gauge and graph mode to display wind, depth and speed data, or customise the pages to display the marine and boat data that is most important to you.

Auto Scroll
Set your display to automatically cycle between pages at a speed you set for convenient, hands-free operation.

Low Power Consumption
Perfect for sailors who want to sail for long intervals without having to run a motor or generator to charge batteries. The GNX 21 uses only 25 mA with 350 mW daytime usage, requiring no backlight and just 400 mW with a mid-level backlight setting at night.

NMEA® 2000
Monitor more than 50 marine and boat parameters, including GPS speed, water depth and temperature, wind direction, and wind speed from the NMEA 2000 bus. You can also add a NMEA 0183 device using the optional 7-pin bare-wire power/data cable.

Technical specifications

Dimensions	110 x 115 x 30 mm
Display size	83 x 60 mm, diagonal 102 mm
Display type	Inverted LCD
Weight:	230 g
Waterproof	Yes, to IPX7
NMEA2000 certified	Yes
NMEA0183 compatible	Yes
current consumption (watts)	0.35 W (day) / 0.4 W (night)
Voltage range	9 - 16 V
Mounting options	Flat or flush
Composite glass display	Yes
Temperature range	-15 °C to +70 °C
Compass-safe distance	209 mm
Included in delivery	GNX 21, Trim piece snap cover, Protective cover, Flush mount gasket and hardware, NMEA 2000 drop cable, NMEA 2000 T-connector, Installation instructions, Documentation