The Garmin GMR18 xHD3 18-inch, 4 kW radar dome is built for offshore navigation, delivering long-range radar imaging when paired with a compatible Garmin chartplotter. It provides crisp imaging, rapid target updates, and advanced tracking to enhance situational awareness on the water.
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Dome Size: 18-inch radar dome optimized for long-range performance
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Power: 4 kW magnetron for strong radar returns and long-range detection
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Detection Range: 20 meters to 48 nautical miles for close-in maneuvering and distant targets
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Rotation Rate: Up to 60 rpm for rapid redraws and timely target updates on your MFD
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Scan Averaging: reduces sea clutter and interference for cleaner radar returns
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True Echo Trails: displays historical boat trails to help identify moving targets
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Bird Gain & Bird Mode: helps locate surface flocks and fish-holding areas beneath
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MARPA Technology: tracks selected targets to assist with navigation and collision avoidance (heading sensor required)
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Radar Overlay: radar images overlaid on charts on a compatible chartplotter (heading sensor required)
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Dome Drive Motor: low-noise operation for smooth, dependable performance
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Connectivity: Garmin Marine Network compatibility for easy connection to compatible chartplotters or MFDs
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Included Accessories: 15 m power cable, 15 m network cable, mounting hardware kit with template, installation instructions
With the GMR18 xHD3, you gain a robust long-range radar that complements your Garmin chartplotter, giving you confidence during offshore passages and in busy waters. Its 4 kW magnetron provides clear, high-definition returns while features like scan averaging and true echo trails reduce clutter and clarify target movements. MARPA tracking supports safe navigation and collision avoidance when paired with a compatible heading sensor, and radar overlay lets you view radar data directly over your charts. The included cables and mounting hardware simplify installation, so you can upgrade your setup quickly and start benefiting from enhanced situational awareness and faster, more informed decisions on the water.
