Garmin GMR 18 xHD3 18" Radar Dome

Garmin GMR 18 xHD3 18" Radar Dome (010-02841-00)

Take radar performance to the next level with the Garmin GMR 18 xHD3 18" Radar Dome — a compact yet powerful dome radar that incorporates features once reserved only for open-array systems. Offering superior detection of vessels, weather, and obstacles, this 4 kW unit ensures peace of mind in challenging conditions.

Key Features & Benefits

• 4 kW Power Output with 48 Nautical Mile Range – Delivers strong radar echoes at long distances.
• Scan-Averaging Technology – Filters sea clutter and interference to highlight consistent targets.
• Angular Target-Size Adjustment – Pulse expansion and processing fine-tune object shapes for clearer display.
• Dual-Range / Split-Screen Display – View close and long-range imagery side-by-side or overlay both on a chart.
• Bird Detection Mode / Auto Bird Gain – Automatically highlights flocks at surface level — ideal for anglers searching baitfish.
• True Echo Trails – Presents a historic “trail” behind moving objects, removing relative-motion distortions so you can track threats more clearly.
• Rotation Speeds up to 60 RPM – Faster redraw rates for quicker target updates.
• Dynamic Auto Gain & Dynamic Sea Filter – Automatically adjust gain and sea clutter filtering based on conditions.
• Radar Overlay on Chart – Seamlessly superimpose radar returns onto your map display (requires compatible chartplotter).
• High-Resolution Radar – Narrow beamwidth and high antenna gain improve target differentiation and clarity.
• Dual-Radar Support – Supports redundancy and diverse radar data sources for safer navigation.
• MARPA Target Tracking (up to 30 targets) – Track multiple moving objects simultaneously (requires heading sensor).
• Guard Zone & Range/Bearing Cues – Define a protected zone and get alerts when objects enter it; quickly measure distance and bearing to targets or land.

In the Box

• GMR 18 xHD3 Dome Radar
• 15 m / 49.2 ft Power Cable
• 15 m / 49.2 ft BlueNet™ Network Cable
• BlueNet™ Network to RJ45 Adapter Cable
• Mounting Hardware Kit & Template
• Installation Instructions

Technical & Electrical Specifications

• Dimensions: 20" diameter × 9.8" height (508 mm × 248 mm)
• Weight: Approx. 7.0 kg (≈ 15.4 lbs)
• Waterproof Rating: IPX7 (marine-rated)
• Antenna Length: 17" (43 cm)
• Rotation Speed: Up to 60 RPM, depending on mode
• Beam Width: 5.2° horizontal × 25° vertical
• Minimum Range: 20 meters
• Power Input: 11–32 V DC
• Standby Power Consumption: ~15 W
• Transmit (Normal Mode): ~40 W
• Transmit Power: 4 kW

Why Choose the GMR 18 xHD3?

The Garmin GMR 18 xHD3 blends ease-of-use and elite radar features in a dome form factor — perfect when deck height or mounting clearance is limited but you still demand open-array-level performance. With features like scan averaging, True Echo Trails, dual-range overlay, and bird detection, it’s a compelling choice for cruisers, offshore anglers, and anyone navigating low-visibility or congested waters. When paired with Garmin chartplotters and heading sensors, it unlocks full MARPA support, radar overlay, and split-range flexibility.

Whether protecting your vessel, tracking weather, or locating baitfish, this dome radar answers the call.

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.