Garmin's GNX 21 is the first glass-bonded marine instrument with a combination of directly driven LCD segments and a dot-matrix field that directly displays graphical information. Its low power consumption makes it perfect for use on sailboats, and is also ideal for cruising and fishing.

The Garmin marine instrument has an inverted display with white or colour digits on a black background that clearly displays depth, speed, wind and over 50 other marine and boat parameters. The glass-bonded display has an anti-glare lens coating and offers excellent daytime and night-time readability, with high-contrast digits scalable up to 36mm. If you'd prefer a black on white/colour display inverted display, check out Garmin's GNX 20 Marine Instrument.

Fully customisable user profiles display wind, depth and speed data. Furthermore, an auto-scroll feature rotates through data screens for hands-free operation. The marine instrument can be installed with a low profile flush mount (included) or optional flat mount for the ultimate glass helm solution and custom look for your boat.

Key Features:

5 display configurations plus a gauge and graph mode that display depth, speed, wind and over 50 other marine and boat parameters.
Choose from 7 different backlight colours, or even create a customised colour.
Fully customisable user profiles for sail or power boating to display important marine and vessel data.
Glass-bonded display with anti-glare lens avoids fogging.
Large, easy-to-read white or a choice of seven colour digits on a black background for high visibility in low light or darkness.
Low power consumption: 25mA with mW (no backlight), 400wW (mid-level backlight).

What's In The Box?

GNX 21.
Trim piece snap cover.
Protective cover.
Flush mount gasket and hardware.
NMEA 2000 drop cable.
NMEA 2000 T-connector.
Installation instructions.
Documentation.

Technical Specifications:

General:
Dimensions: 110 x 115 x 30mm.
Display Size: 83 x 60mm; 101.6mm diagonal.
Display Type: Inverted LCD, monochrome.
Weight: 230g.
Water Rating: IPX7.
Mounting Options: Flat or Flush.
Glass Bonded Display: Yes.
Temperature Range: -15C to +70C.
Weight: 230g.

Sensors:
NMEA 0183 Compatible: Yes.

Electrical Features:
Power Consumption: 0.35W (day), 0.4W (night).
Compass Safe Distance: 209mm.

Instrument Features:
Auto-On: Yes.
User Profiles: Yes.

Compatible Devices:

echoMAP CHIRP 55dv.
echoMAP CHIRP 75dv.
echoMAP CHIRP 75sv.
echoMAP CHIRP 92sv.
echoMAP CHIRP 95sv.
ECHOMAP Plus 65cv.
ECHOMAP Plus 72cv.
ECHOMAP Plus 75cv.
ECHOMAP Plus 75sv.
ECHOMAP Plus 95sv.
ECHOMAP UHD 75cv.
ECHOMAP UHD 75cv.
ECHOMAP UHD 95sv.
ECHOMAP Ultra 102sv (with or without GT56UHD-TM Transducer).
ECHOMAP Ultra 122sv (with or without GT56UHD-TM Transducer).
GPSMAP 1020.
GPSMAP 1020xs.
GPSMAP 1022.
GPSMAP 1022xsv.
GPSMAP 1222.
GPSMAP 1222 Plus.
GPSMAP 1222 Touch.
GPSMAP 1222xsv.
GPSMAP 1222xsv Plus.
GPSMAP 1222xsv Plus Bundle.
GPSMAP 1222xsv Touch.
GPSMAP 1223, Non-sonar with Worldwide Basemap.
GPSMAP 1223xsv, SideVü, ClearVü and Traditional CHIRP Sonar with Worldwide Basemap.
GPSMAP 4008.
GPSMAP 4010.
GPSMAP 4012.
GPSMAP 451.
GPSMAP 451s.
GPSMAP 5008.
GPSMAP 5012.
GPSMAP 5015.
GPSMAP 521.
GPSMAP 521s.
GPSMAP 527.
GPSMAP 527xs.
GPSMAP 551.
GPSMAP 551s.
GPSMA 556.
GPSMAP 556s.
GPSMAP 557.
GPSMAP 557xs.
GPSMAP 6008.
GPSMAP 6012.
GPSMAP 7012.
GPSMAP 7015.
GPSMAP 720.
GPSMAP 721.
GPSMAP 721xs.
GPSMAP 722.
GPSMAP 722 Plus.
GPSMAP 722xs.
GPSMAP 722xs & GMR 18HD+ bundle.
GPSMAP 722xs Plus.
GPSMAP 722xs Plus Bundle.
GPSMAP 723, Non-sonar with Worldwide Basemap.
GPSMAP 723xsv, SideVü, ClearVü and Traditional CHIRP Sonar with Worldwide Basemap.
GPSMAP 7407.
GPSMAP 7407xsv.
GPSMAP 7408.
GPSMAP 7408xsv.
GPSMAP 7410.
GPSMAP 7410xsv J1939.
GPSMAP 7412.
GPSMAP 7412xsv.
GPSMAP 7416.
GPSMAP 7416xsv.
GPSMAP 750.
GPSMAP 751.
GPSMAP 751xs.
GPSMAP 8008 MFD.
GPSMAP 8012 MFD.
GPSMAP 8015 MFD.
GPSMAP 820.
GPSMAP 820xs.
GPSMAP 8410.
GPSMAP 8410xsv.
GPSMAP 8412.
GPSMAP 8412xsv.
GPSMAP 8416.
GPSMAP 8416xsv.
GPSMAP 8417 MFD.
GPSMAP 8422 MFD.
GPSMAP 8424 MFD.
GPSMAP 8500 Black Box.
GPSMAP 8530 Black Box.
GPSMAP 8700 Black Box.
GPSMAP 922.
GPSMAP 922 Plus.
GPSMAP 922xs.
GPSMAP 922xs & GMR 18HD+ Bundle.
GPSMAP 922xs Plus.
GPSMAP 922xs Plus Bundle.
GPSMAP 923, Non-sonar with Worldwide Basemap.
GPSMAP 923xsv, SideVü, ClearVü and Traditional CHIRP Sonar with Worldwide Basemap.
Volvo Penta Glass Cockpit System.