Master the seas with the GMI 40 multipurpose marine instrument. It’s easy to use and has a sleek 4.3″ touchscreen display that supports realtime wind, speed, depth, heading, engine, fuel data and more. GMI 40 seamlessly integrates with your compatible Garmin chartplotters and wireless devices. New GMI 40 bundles offer complete sailing packages with multiple display, depth, speed and wind sensor options.