Garmin GMR 18 xHD3 18-inch Radar Dome – High-Performance Marine Radar with 48 Nautical Mile Range

GMR 18 xHD3 18 Radar Dome

Loaded with advanced features typically found on open arrays, this powerful 18 dome radar offers superior traffic, obstacle, and weather detection for peace of mind on the water.

Features:

• 4 KW power output, 48 nautical mile max range


• Scan-averaging technology


• Improved target-size processing


• Split-screen dual-range display


• Bird detection


• Quiet dome-drive motor

Scan Averaging Technology

A first for Garmin magnetron radar, scan averaging helps filter out sea clutter and interference to enhance the detection and display of consistent targets.

Angular Target-Size Adjustment

Pulse expansion and angular target-size processing techniques optimize on-screen object shapes for better interpretation at all range scales.

Faster Scanning Antenna

Rotation speeds up to 60 rpm improve the redraw rate for faster target updates.

True Echo Trails

A historical trail of boats on the water is displayed on the screen, removing relative motion influences to help you quickly identify moving targets and potential collision threats.

Dual Range with Overlay

A single radar antenna is capable of providing split-screen, side-by-side images on your compatible chartplotter, with independent range settings and controls for both close and long range. Overlay either or both ranges on a chart.

Dynamic Auto Gain

Gain automatically adjusts levels to optimum settings for harbors, near shore, and offshore in open waters.

Radar Overlay

See overlaid images on your chartplotters map screen (with appropriate sensors, sold separately).

High-Resolution Radar

Pick out targets at a distance thanks to a narrow horizontal beamwidth and high antenna gain.

Dual-Radar Support

This provides redundancy and allows each display unit to pull data from different sources.

Dynamic Sea Filter

Radar gain automatically adjusts sea clutter for calm, medium, and rough sea conditions.

Auto Bird Gain

Locate flocks of birds at the waters surface, where baitfish are also likely to be found.

MARPA Target Tracking

Track up to 30 targets to help avoid collisions (with appropriate sensors, sold separately).

Guard Zone

Set the safety zone and receive an alarm when an object enters the zone.

Range and Bearing Cues

Variable range markers and electronic bearing lines allow rapid measurements of distance and bearing to vessels and land.

In the Box:

• GMR 18 xHD3 dome radar


• Power cable (15 m/49.21 ft)


• BlueNet network cable (15 meters)


• BlueNet Network to RJ45 Adapter Cable


• Mounting hardware kit and template


• Installation instructions

General:

• Dimensions: 20 x 9.8 (508 mm x 248 mm)


• Weight: 7.0 kg


• Waterproof: IPX7


• Antenna length: 17 (43 cm)


• Rotation Speed (RPM): Up to 60 RPM, depending on settings


• Beam Width: 5.2 horizontal, 25 vertical


• Maximum Range: 48 nm


• Minimum Range: 20 meters
  • Radar Type: Radome
  
  

Electrical Features:

• Power Input: 11-32 v DC


• Power Consumption (Standby): 15 W


• Typical Power Consumption, Transmitting (Normal Mode): 40 W


• Transmit Power: 4 KW

Radar Features:

• Dual Range: Yes


• Overlay: Yes


• Dual Radar Support: Yes


• Auto Bird Gain: Yes


• Auto Gain: Dynamic


• MARPA Target Tracking: Yes (requires heading sensor, sold separately)


• Echo Trails: True


• Target Size: Yes


• Scan Averaging: Yes

The Garmin GMR 18 xHD3 radar dome offers advanced marine detection capabilities suitable for both recreational and professional vessels. Featuring a 4 kW power output and a maximum range of 48 nautical miles, this radar provides superior traffic, obstacle, and weather detection to enhance safety and situational awareness on the water. Its compact 18-inch radome design integrates sophisticated features such as scan-averaging technology that filters sea clutter and interference, delivering clearer target detection even in challenging conditions. The high-speed antenna can rotate up to 60 RPM, ensuring faster updates of moving targets and reducing response times during navigation.

The Garmin GMR 18 xHD3 includes dual-range capabilities with overlay options, allowing users to monitor close-in and distant targets simultaneously on compatible chartplotters. Its split-screen display and independent range controls facilitate versatile viewing, while true echo trails help identify moving vessels by displaying historical target paths unaffected by relative motion. Additional features like dynamic auto gain, sea filter, and auto bird gain optimize radar performance across varying sea states, from calm waters to rough seas. The radar also supports MARPA target tracking for up to 30 targets, providing critical collision avoidance data when paired with appropriate sensors.

Designed for ease of use and durability, the Garmin GMR 18 xHD3 is waterproof with an IPX7 rating and includes comprehensive mounting hardware, power and network cables, and detailed installation instructions. Its high-resolution radar with narrow beamwidth ensures excellent target resolution at long distances, making it an essential tool for safe and confident navigation. Whether navigating coastal waters or open seas, this radar dome provides reliable, real-time data to keep you informed and secure in all marine environments.

Features:

• Power Output: 4 kW for maximum range and detection capabilities

• Maximum Range: 48 nautical miles for long-distance navigation

• Scan-Averaging Technology: Filters clutter and interference for clearer targets

• Target-Size Processing: Enhances interpretation of on-screen objects

• Split-Screen Dual-Range Display: Simultaneous close and distant target monitoring

• Bird Detection: Locates flocks of birds indicating baitfish presence

• Quiet Dome-Drive Motor: Reduces noise during operation

• Faster Scanning Antenna: Rotates up to 60 RPM for quick updates

• True Echo Trails: Displays historical vessel paths to identify movement

• Dynamic Auto Gain: Adjusts gain automatically based on water conditions

• Radar Overlay: Supports overlay on compatible chartplotters for integrated display

• High-Resolution Radar: Narrow beamwidth for precise target identification

• Dual Radar Support: Allows multiple data sources for redundancy

• Sea Filter: Automatically adjusts clutter suppression for various sea states

• MARPA Target Tracking: Tracks up to 30 targets for collision avoidance

• Guard Zone: Sets safety zones with alarms for object intrusion

• Range and Bearing Cues: Measures distance and heading rapidly

• Durable Waterproof Design: IPX7 rated for marine environments