Upgrade your Cortex V1 or M1 with the Garmin GA38 GPS/GLONASS Antenna — an external solution built for marine and outdoor use that delivers faster satellite locks and improved positioning when paired with Cortex systems.
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GPS/GLONASS compatibility: External antenna that leverages both satellite systems for faster locks and improved accuracy when paired with Cortex V1 and M1.
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Rugged, low-profile housing: Black housing with a fully gasketed, high-impact plastic alloy casing, IPX7 waterproof protection for challenging marine environments.
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Flexible mounting options: Pole mounting, surface mounting, or under-deck mounting (underside of fiberglass decks) to suit a variety of vessel layouts without compromising hull integrity.
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Compact size and weight: Dimensions 3 19/32" x 1 15/18" (91.6 mm x 49.5 mm); weight 7.1 oz (201 g).
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What’s in the box: GA 38 - Black; surface mounting bracket; pole mounting bracket; mounting hardware; BNC-SMA antenna cable (32 ft / 10 m); installation instructions.
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Model compatibility: Model 010-13305-20 built to deliver dependable performance with Cortex V1 and M1 systems.
By combining GPS and GLONASS with Cortex V1/M1, the GA38 reduces lock time and enhances positioning accuracy in demanding conditions. The IPX7-rated, gasketed housing protects the antenna from water exposure, while multiple mounting options enable installation on a pole, flat surface, or under a fiberglass deck—maximizing satellite visibility across a range of vessels. The included brackets, mounting hardware, and lengthy BNC-SMA cable simplify installation on diverse platforms, helping you maintain reliable navigation on every voyage.
| Dimensions (DxH) |
3 19/32" x 1 15/18" (91.6 mm x 49.5 mm) |
| Weight |
7.1 oz (201 g), white |
| Case material |
Fully gasketed, high-impact plastic alloy, waterproof to IPX7 |
