Garmin GMI 20 Marine Instrument Display

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GMI™ 20 Marine Instrument DisplayPerfectly Designed for Power & Sail VesselsThe GMI 20 digital marine instrument display is perfectly designed for both power and sail vessels. Designed to cl...
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GMI™ 20 Marine Instrument Display

The Flawlessly-Designed Display for Power and Sail Boats!

The GMI 20 computerized marine instrument display is splendidly intended for both powerboats and sailboats. Intended to indicate details like speed, depth, wind and 100+ marine and vessel parameters, its huge, brilliant 4" color display with additional enormous digits is anything but difficult to see at a distance and 170-degree viewpoint.

A glass-reinforced completion lens counteracts misting and builds contrast. The daylight readability is upgraded with a high complexity color plan. For improved night visibility, you have a decision of red/black, green/black or the typical night mode color plan alongside a dimmer control. Screens can be set to auto-scroll, switching between pages consequently without your completing a thing. This is particularly profitable to mariners as it enables you to introduce the unit(s) in a more prominent variety of areas on the vessel. Default profiles can be redone for powerboat, sailboat, angling, motor/fuel, in addition to a few other user-indicated profiles. Power is provided by the NMEA 2000® system.

Moreover, the GMI 20 likewise highlights a dedicated race clock that tallies down and checks up, with an inside beeper. You additionally get 2 trim snap pieces cover choices which enable you to coordinate the GMI 20 with the GPSMAP® 500/700 arrangement, GPSMAP 8000 Glass Helm arrangement or heritage Garmin chartplotters.

Key Features:
• Marine instrument show plainly demonstrates depth, speed, wind, and 100+ marine and vessel parameters
• Enormous, splendid 4" color glass-reinforced lens display with anti-glare finishing
• Simple to view from a distance and 170-degree review point
• Upgraded evening time meaningfulness with backdrop illumination dimmer and full shading or red/dark or green/dark shading plans
• Upgraded sunlight readability with new high difference color alternative

• Measurements without sun cover (HxWxD): 110 x 115 x 30 mm (4.33" x 4.53" x 1.18")
• Measurements with sun cover (HxWxD): 115 x 120 x 35.5 mm (4.53" x 4.72" x 1.40")
• Temperature run: From 5x to 158x F (from - 15x to 70x C)
• Compass-safe distance: 209 mm (8.25")
• Compass-safe distance: 209 mm (8.25")
• Weight without sun cover: 247 g (8.71 oz)
• Weight with sun cover: 283 g (9.98 oz)
• Case material: Polycarbonate, waterproof to IPX7
• NMEA 2000r information voltage: 9-16 Vdc
• NMEA 2000 burden equivalency number (LEN): 6 (300 mA at 9 Vdc)
• Power use: 2.5 W max
• Unit max. voltage: 32 Vdc

WarningWARNING: 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

Quick Guide (pdf)
Owner's Manual (pdf)

BOE Marine is known for providing the absolute best installations on the brands we carry. We are pleased to expand our footprint in partnership with companies that share the same ideals as us. Listed below you will find our Installation Partners in key regions around the country. You can contact these companies directly and get the same great service you expect from BOE Marine. Through our partnerships you are able to order your equipment at the best prices, tax free, from our website. Then have one of our Installation Partners perform a high quality installation.

Our program is built upon a high degree of accountability. Our Installation Partners expect us to give great advice, prices, and supply all of the parts needed for the install. And we expect our Installation Partners to provide an expert installation in a timely manner and provide support for any equipment malfunctions or installation issues.

As the customer, you can be assured that you are buying from a dealer authorized in the brands we carry. And you will receive uncompromising advice and support on the local level from the Installation Partner, or via phone with BOE Marine. We feel there is no better package to get you the best pricing along with experienced local service.

Mid-Atlantic (MD, DE, DC)
Serviced by BOE Marine 866-735-5926

Palm Beach / Treasure Coast

Serviced by BOE Marine of Stuart 772-600-5701

Florida West Coast (Tampa/St Pete Area)

Bluewater Custom Marine - 727-488-7171
Mobile Electronics Installation
St. Petersburg, FL
CONTACT: Martin Warren
Email: [email protected]

Fort Lauderdale - Miami Dade

Parker Yacht - 954-463-1515
225 SW 32nd Street
Fort Lauderdale, FL 33315
CONTACT: Ole Parker
Email: [email protected]


HMS Marine Electric, LLC - 251-591-3283
400 Myrtle Avenue
Fairhope, AL 36532
CONTACT: Maclin Smith Jr.
Email: [email protected]

Cape Cod & Islands

Dempsey Marine Electronics & Electrical - 508-360-1094
234 Queen Anne Road #2
Harwich Mass 02645
CONTACT: Tom Dempsey
Email: [email protected]

Texas - Houston/Galveston & Surrounding Areas

Bill Platt Electronics - 409-739-3489
3501 Tallow Forest St
Dickinson, TX 77539
CONTACT: Bill Platt
Email: [email protected]

Washington DC / Occoquan

Jimmy's Mobile Marine
James Deuterman
9192 Big Springs Loop
Bristow, VA 20136
Email: [email protected]

Baton Rouge, LA

David Wade Marine
18150 Petroleum Dr
Baton Rouge, Louisiana
(225) 752-3789
Email: [email protected]


Spar Yard Marine
6 Spar Lane Sandy’s, MA01
Email: [email protected]

Long Island, NY

Jeff's Marine Electronics
8 Rugby Dr
Shirley, NY 11967
631-874-0070 or 631-469-1645 (cell)

Installers - Do you have what it takes to be an Authorized BOE Installation Partner?  If you can demonstrate a proven track record of impeccable customer service and expert installations then we will consider adding you to this list in markets not already covered. Please email [email protected] to inquire.

More Information
SKU GAR-010-01140-00
Price $579.99
Manufacturer Garmin
Custom Discount Discount - Electronic Products

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Product Questions

  • 0
The information that can be displayed is variable based on what is connected to the NMEA2000 network. I do know of a list that exists that will list all different possible configurations but if you follow this link,, you will see more layout options that can be displayed. If you have specific questions please give us a call and we can get the right answers. 866-735-5926.
By Emily Wille on 08 September, 2022
  • 1

Yes, direct replacement

By James Maier on 01 June, 2021
Thank you for the vote.

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