Garmin GNX™ 21 Marine Instrument w-Inverted Display - 4"
SKU: 66309952897

Garmin GNX™ 21 Marine Instrument w-Inverted Display - 4"

Sale price$192.99 Regular price$214.43
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Description

Garmin GNX™ 21 Marine Instrument w-Inverted Display - 4"GNX 21 Marine Instrument with Inverted Display 4" Marine Instrument with Inverted 4" LCD Large, easy to read white or color digits on a black background for high visibility in low light or darkness; choose from 7 customizable backlight colors Glass bonded display with anti glare lens avoids fogging Fully customizable user profiles for sail or power boating to display most important marine and vessel data Low power consumption (25 mA) with 350 mW (no

GNX™ 21 Marine Instrument with Inverted Display - 4"

Marine Instrument with Inverted 4" LCD

  • Large, easy-to-read white or color digits on a black background for high visibility in low-light or darkness; choose from 7 customizable backlight colors
  • Glass-bonded display with anti-glare lens avoids fogging
  • Fully customizable 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 easy-to-read GNX 21 marine instrument has an inverted display with white or color digits on a black background that clearly shows 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.

Customizable Color Digits

Choose from 7 different backlight colors, or even create a customized color, to achieve the screen that provides optimum readability for you.

Customizable User Profiles

Fully customizable 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 customize 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.

In The Box

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

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.


Manufacturer : Garmin
Manufacturer Part No : 010-01142-10
UPC : 753759120962
Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 66309952897

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A
Verified Purchase
Amazon Customer
Bozeman, US
★★★★★ 5
Long sun battery.
Color: Brown
Great. Looks good, feels great and the solar can wait 5 days w/o sun in a box.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
N
Verified Purchase
Nathan
Natrona Heights, US
★★★★★ 5
A nice durable non flashy field watch.
Color: Olive/Gunmetal, Color: Olive/Gunmetal
A nice looking, none flashy field watch. At 41mm it’s not too big and not too small. The sapphire crystal is a big plus on scratch resistance; and the screw in crown is a nice addition as well. If you’re looking for a low key, reliable solar powered field watch that is both comfortable, affordable and has durability built into it, this one will be hard to beat.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 8, 2025
H
Verified Purchase
Hobbyhobbit
Fort Morgan, US
★★★★★ 2
Keeps lousy time
Color: Silver-Tone/Black
I purchased this watch off Amazon Warehouse well below MSRP out of curiosity to see what Timex is doing in 2024. The specs are good - bead blasted stainless case, solar movement with quick set date and hacking, sapphire crystal, screwdown crown and 100m water resistance. The movement is Japanese, case and bracelet are made in China, and the watch is assembled somewhere overseas. The good - the watch is lightweight and comfortable on the wrist. Price, even at full MSRP makes this an extremely good value for what you get. It is a good looking Flieger style watch. Once fully charged it is keeping good time. Case finish is well executed and without rough or sharp edges. The bad - the lume is weak. When blasted with UV, it fades quickly and within 5 minutes it’s gone. The bracelet is low end, but expected at this price point. I swapped it out with a nice leather strap from my collection with better quality spring bars and it makes the watch look and feel higher end. The Ugly - the second hand misses nearly all the chapter ring marks. The minute and hour hands are aligned, but that second hand seems to have a mind of its own. On my watch it lines up with chapter ring marks maybe 10% of the time, but it’s not consistent. Sum up, for a sub $200 watch the specs are great and it’s a good looking comfortable watch. Just keep your expectations aligned with what you are paying for. It compares favorably to Orients & Citizens at this price, and offers better value than comparable competitors now that Seiko has gone upmarket. I like this watch. Just don’t compare it to a Swiss watch costing several times its price. Update after a few months: I’m changing my rating to 3 stars. This watch keeps lousy time! It is loosing around 5 minutes per month. And it is fully charged. I have other Solar quartz watches from Citizen, Seiko and Vaer which maintain very good accuracy. But this Timex … defeats the purpose of a solar powered “grab and go” watch when you have to correct the time each occurrence you want to wear it.
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Reviewed in the United States on February 1, 2024
K
Verified Purchase
Kindle Customer
Phoenix, US
★★★★★ 5
Great Watch with Great Sapphire Crystal
Color: Olive/Gunmetal
Waited 2.5 years before reviewing. I love the gunmetal grey case, olive dial, and the exceptional sapphire crystal. The watch is still running great. During cold weather when wearing long sleeves, I make sure I charge the watch monthly by placing it under a table lamp for many hours because it died once due to no daylight charging. One problem is being able to see the minute markings. (The same watch with blue dial is much easier to read.) I also replaced the military-style band immediately with the excellent Archer 20mm Olive band (ARC-QRN-OLV20) and Archer 20mm Matte Gunmetal buckle ( ARC-BKL-GRYM20). I am only allowed to review once for this Timex model, so adding comments about the "Blue" version (TW2V03600JR). The blue version is the same watch but easier to view. It looks GREAT with the Archer 20mm Navy Blue band (ARC-QRN-NVY20).
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Reviewed in the United States on October 19, 2025
S
Verified Purchase
Steve
Birmingham, US
★★★★★ 3
I design flaw caused me to return it.
Color: Brown/Blue
Pros: - Perfect case size. - Sapphire crystal. - Solar powered quartz. - Large dial face - Minute and second hands reach to minute track for precise reading. - Great field watch design and proportions. - Effective lume on hands. Cons: - Lume on small triangular hour markers is useless, and fades quickly. - The hour numbers are not luminous. - The dull peach color chosen for the hour markers, numbers and hands in dim lighting is very dull and thus hard to read. - The dark blue color chosen for the dial is a dull hue that doesn’t really look blue, but just reduces the contrast between text and markers. - A black dial and bright white markers and numbers would make the watch much more legible/ readable, and would look much better aesthetically. It is a shame that these choices were made on an otherwise perfect design. - I was really excited that Timex finally seemed to get it when they came out with this series of models, but then they handicapped it with a dial that is only useable in bright light. What a shame. I am returning the watch.
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Reviewed in the United States on July 23, 2022

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