Garmin GA™ 38 GPS and GLONASS antenna with BNC-BNC connector is a rugged external marine antenna, designed to provide stable and accurate positioning by combining standard GPS and the GLONASS satellite constellation. The antenna is housed in a waterproof, low-profile enclosure, making it ideal for both recreational and professional vessels where reliable navigation is essential.
The GA™ 38 is particularly well-suited for situations where internal antennas have limited reception – for example, on boats with covers, metal, electronics, or dashboards that may interfere with the signal. With three flexible mounting options, the antenna can be installed exactly where signal conditions are best: pole mount, flush mount, or under-deck mount (on the underside of fiberglass decks).
The external antenna solution provides greater installation flexibility, improved signal stability, and more consistent position data for compatible marine devices from Garmin.
Key features
Supports both GPS and GLONASS for higher positioning accuracy
Waterproof, low-profile enclosure – ideal for maritime environments
Three mounting options: pole, flush, and under-deck
Improves signal reception on boats with limited visibility
BNC-BNC connector – compatible with select Garmin marine devices
