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Imagine navigating open waters with confidence, even in areas where GPS signals falter. The Garmin GA 38 antenna steps up by combining GPS and GLONASS satellite systems, delivering more reliable positioning data for your Cortex V1 or M1 chartplotter. This isn't just about locking onto satellites—it's about doing so faster and more accurately, especially in challenging marine environments like dense foliage near coastlines or high-latitude voyages where GLONASS shines with its additional constellation.
Crafted for real-world boating demands, its low-profile design hugs surfaces without snagging lines or obstructing views, while the rugged housing withstands splashes, rain, and rough handling. Boaters report noticeably quicker fixes and fewer dropouts compared to GPS-only setups, making it a smart upgrade for fishing trips, coastal cruising, or offshore adventures.
One size doesn't fit all boats, so this antenna offers three intuitive mounting options to match your setup:
These options make installation straightforward, often completable in under an hour with basic tools, preserving your boat's aesthetics and functionality.
| Specification | Details |
|---|---|
| Dimensions (Diameter x Height) | 3 19/32" x 1 15/18" (91.6 mm x 49.5 mm) |
| Weight | 7.1 oz (201 g) |
| Housing Material | High-impact plastic alloy, fully gasketed |
| Waterproof Rating | IPX7 (survives 1m submersion for 30 minutes) |
| Cable | BNC to SMA, 32 ft (10 m) length |
| Satellite Systems | GPS and GLONASS |
Engineered specifically for the Cortex V1 and M1 series, this antenna integrates effortlessly via its BNC-SMA cable. It boosts multi-satellite acquisition, helping your chartplotter maintain pinpoint accuracy for waypoints, autopilot routes, and fishfinder overlays. Users with mixed fleets appreciate how it performs consistently across Garmin's marine ecosystem, reducing the need for multiple antennas.
Start by choosing your mount based on deck material—fiberglass loves under-deck for discretion. Route the 10m cable away from power lines to minimize interference, securing it with zip ties. Test satellite lock before final tightening; aim for a clear sky view. For pole mounts, a slight forward tilt combats boat heel. This setup often yields sub-10-second first fixes, transforming your on-water experience.
It supports both GPS and GLONASS constellations, providing superior coverage and faster signal acquisition, particularly in northern latitudes or obstructed areas.
Three flexible options: pole mount for rails, surface mount for flat areas, and under-deck mount for fiberglass decks, ensuring versatility across boat types.
Yes, it's rated IPX7, meaning it can handle immersion in 1 meter of water for up to 30 minutes, perfect for marine conditions.
The BNC to SMA cable measures 32 feet (10 meters), offering ample length for routing to your Cortex chartplotter without extensions.
Designed for Garmin Cortex V1 and M1 chartplotters, enhancing their GPS/GLONASS performance seamlessly.
Absolutely—the under-deck bracket allows hidden installation under non-metallic decks, transmitting signals effectively without drilling through the surface.
GLONASS adds more satellites (up to 24), improving accuracy and reliability in urban canyons, forests, or polar regions where GPS might struggle.
Garmin GA™ 38 GPS and GLONASS Antenna for Cortex® V1 and M1, White
Model: 010-13305-00Built to take advantage of the GLONASS system/constellation of satellites as well as standard GPS, this robust external antenna is packaged in a low-profile water resistant housing and provides 3 easy mounting solutions: pole, surface or under-deck (for the underside of fiberglass decks).
Built to take advantage of the GLONASS system/constellation of satellites as well as standard GPS, this robust external antenna is packaged in a low-profile water resistant housing and provides 3 easy mounting solutions: pole, surface or under-deck (for the underside of fiberglass decks).
Specifications| 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 |
Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
US$40
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