Compared across 4 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.
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The GA 38 is a remote-mount GPS and GLONASS antenna that connects to compatible Garmin marine chartplotters and network devices over a BNC cable. It is designed to be mounted where it gets a clear view of the sky, such as a mast, hardtop or rail, and feeds position data to the boat's electronics. It is a replacement or upgrade part rather than a standalone receiver, so it only makes sense if your Garmin unit supports an external antenna. Compared with built-in antennas on compact plotters, it gives you placement freedom and better sky view on larger boats.
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Lowest price we've seen: $130.12 on Nov 10 at TWIST. Tracked across 4 stores since Nov 10.
Owners who buy the GA 38 generally treat it as a reliable replacement antenna for Garmin marine setups. They report solid satellite lock once it is mounted with a clear sky view, and note that results depend heavily on the connected unit and cable run.
