Simrad GPS Antenna GS25

Enhance Your Boating Navigation with Superior Precision

Imagine cruising through choppy waters or navigating tight marinas where every second counts for positioning and direction. The Simrad GS25 GPS antenna stands out by delivering not just pinpoint location data but also reliable magnetic heading information. This dual capability ensures your charts stay rock-steady and radar overlays align perfectly, even at high speeds or during quick maneuvers. Boaters trust it for its blend of speed and accuracy, making it a go-to upgrade for anyone serious about seamless on-water performance.

What sets this antenna apart is its built-in rate-stabilized heading sensor, which provides boat direction without relying on external compasses. Whether you're overlaying radar returns on your chartplotter for better situational awareness or tracking speed in real-time, the GS25 keeps you informed with updates up to 10 times per second. It's designed for the demands of marine environments, from coastal fishing trips to offshore adventures.

Standout Features That Deliver Real Results

• Lightning-Fast Position Updates: Enjoy 10Hz refresh rates for smoother tracking of your vessel's movement, crucial during high-speed runs or in congested areas.
• Multi-GNSS Support: Locks onto GPS, GLONASS, WAAS, EGNOS, and more for superior signal acquisition in challenging conditions like dense fog or urban coastal zones.
• Integrated Heading Sensor: Delivers stable magnetic heading data, perfect for stabilizing charts and enhancing radar performance without speed limitations.
• Rugged and Versatile Mounting: Options for pole, surface, or flush installation on any boat hull, with a compact white plastic housing that blends in.
• IPX7 Waterproof Build: Thrives in harsh saltwater exposure and extreme temperatures from -22°F to 140°F, built to Simrad's yachting-grade standards.
• Plug-and-Play NMEA 2000 Connectivity: Seamlessly integrates with Simrad NS Series displays and broader networks for effortless setup.

These aren't just specs—they translate to confidence on the water. For instance, the rapid signal lock means less downtime waiting for a fix, while consistent accuracy helps avoid those frustrating position jumps that plague lesser antennas.

Easy Installation and Broad Compatibility

Setting up the GS25 is straightforward, even for weekend warriors. It ships ready to connect via NMEA 2000, complete with essentials like a 15-foot extension cable, T-connector, and pole mount. Surface or pole mounting takes minutes, and its low-profile design minimizes wind resistance and drag.

Pair it with multifunction displays for enhanced overlays—think radar echoes perfectly superimposed on charts for spotting hazards early. It's ideal for vessels needing precise data without the bulk of separate GPS and heading units. Just keep in mind it's optimized for positioning and heading, not as a primary rate compass for certain advanced autopilot or target tracking functions—pair it wisely for your setup.

"Switched to the GS25 on my center console, and the chart stabilization is night-and-day better. No more guessing direction in swells." – Experienced offshore angler

Real-World Performance Across Boating Scenarios

Fishermen appreciate the high-speed updates for trolling patterns, while sailors value the heading stability for true wind calculations. Powerboaters use it for radar/chart fusion to navigate busy harbors safely. In tests during rough seas, it maintains lock and heading far better than basic GPS pucks, thanks to its advanced GNSS reception and sensor fusion.

Durability shines through: Fully submersible and resistant to corrosion, it handles spray, rain, and submersion without flinching. Over years of use, it proves reliable, backed by Simrad's commitment to quality marine electronics.

What's Included for Hassle-Free Setup

• GS25 GPS module with integrated heading sensor
• 15-foot (4.5m) NMEA 2000 extension cable
• Network T-connector
• Pole mount hardware

Everything you need to get up and running, minimizing extra purchases and installation headaches.