See all essential data on a sleek, high-resolution color display with the intuitive GMI 40 from Garmin
OLATHE, Kan./Sept. 1, 2026/PR Newswire – Garmin (NYSE: GRMN), the world’s largest and most innovative marine electronics manufacturer, today unveiled the GMI 40 multipurpose marine instrument that displays live boating insights in an easy-to-read format. Boasting a modern, streamlined design that complements Garmin GPSMAP chartplotters, the device has an intuitive touchscreen interface with edge-to-edge glass on a 4.3-inch, high-resolution, color LCD display. The touchscreen optimizes space for a clear, uninterrupted view of instrumentation data, keeping sailors, cruisers and coastal anglers informed throughout the trip.
“Whether sailing, fishing the coast or cruising for the weekend, you need a compact instrument that’s simple to operate and fits cleanly at the helm. Our new GMI 40 delivers that and more with a modern display that networks seamlessly across Garmin’s marine products, putting the real-time data you rely on in one place.” — Susan Lyman, Garmin Vice President of Global Consumer Sales & Marketing
Smooth integration
The cutting-edge GMI 40 integrates with compatible devices on board via the NMEA 2000 network and the Garmin BlueNet network. The powerful marine instrument also has wireless connectivity with gWind wireless sensors, marine remote controls and Garmin quatix marine smartwatches, allowing for easy sharing of data.
Mariners can also keep their GMI 40 software up-to-date via the free, all-in-one ActiveCaptain app on their compatible smartphone. When upgrading from the GMI 20, users can purchase an adapter plate to easily install the GMI 40 into the existing cutout in the dash.
Upgraded data options
Mariners can purchase the GMI 40 on its own, or as part of an exciting bundle to receive enhanced wind and water information. Bundle options include a gWind wired or wireless transducer, which provides a three-bladed anemometer for more accurate wind speed and a twin-fin design for a more stable True Wind Angle (TWA). Boaters can also opt to receive more detailed data below the surface by including a DST820 thru-hull smart transducer or GDT 43 transducer (depth and temperature) and GST 43 (speed/temperature) transducer with their bundle.
The GMI 40 marine instrument is available now with a suggested retail price of $599.99. The GMI 40 bundles range from $1,099.99 to $1,899.99. To learn more, visit garmin.com/marine.
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The GMI 40 seems quite interesting.
For instance, I likw how it and attached Garmin sensors don’t need other Garmin gear to stay updated, or as the manual says:
“You can use the Wi‑Fi feature on this device to connect to the ActiveCaptain app for software updates. Applying an update to this device using the ActiveCaptain app can also update applicable devices connected to the same NMEA 2000 network.”
The WiFi can also send boat data to a Garmin Quatix watch, and one or more GMI 40’s can be remote controlled by a Grid 20, either wirelessly or over N2K.
The GMI 40 also has a high-speed Garmin Network connector, and I’m curious about how that would be useful?
https://www.garmin.com/en-US/p/1849621/pn/010-03411-00/
id are say wanting everything to have high speed one net stuff in the future is a nice part of future proofing. sharing video on a 4.3″ screen….. cool!! its a nice different to the larger td50 i do wonder if it will be powerful enough to run as a seakeeper controller etc
I know I’m in the minority here, but I feel that devices with touchscreen only and no buttons don’t belong on a boat. Buttons allow you to change data screens without looking where your hand is. And try using a touchscreen in cold weather in a storm…