The Garmin GMR 18 HD3 is a next-generation 4kW high-definition dome radar that brings professional-grade scanning to vessels with limited mounting space. Featuring the new Scan Averaging technology, the HD3 series filters out sea clutter and noise more effectively than ever before, revealing consistent targets with incredible precision. Whether you are navigating through thick fog or heavy rain, this 18-inch radome provides the reliability and clarity needed for safe passage.
Technical Specifications
| Brand / Manufacturer |
Garmin Ltd. |
| Model / MPN |
GMR 18 HD3 (010-02843-00) |
| Radar Type |
High-Definition Radome (Magnetron) |
| Dome Diameter |
18 Inches |
| Output Power |
4 kW |
| Beamwidth |
5.2° Horizontal, 25° Vertical |
| Max Range |
36 Nautical Miles |
What's Included?
- GMR 18 HD3 Dome Radar
- Power Cable (15 meters / 49 feet)
- Network Cable (15 meters / 49 feet)
- Mounting Hardware Kit and Template
- Installation Instructions
Enhanced Target Detection & Bird Mode
Command the water with the GMR 18 HD3. Its refined Bird Mode helps anglers locate birds at the water's surface, a key indicator of baitfish and gamefish activity. The improved Target Size adjustment allows you to thicken target positions on the screen for better visibility. With a rotation speed of 24 RPM, this radar provides a steady and reliable update of your surroundings, making it an essential addition to any Garmin-equipped helm.
Frequently Asked Questions
1. How is the HD3 different from the previous GMR 18 HD+?
The HD3 series introduces Scan Averaging technology, which significantly reduces clutter and interference, providing a much cleaner radar image compared to the HD+ models.
2. Is this compatible with Garmin ECHOMAP™ units?
No. The GMR 18 HD3 is designed for the GPSMAP® series MFDs. It is not compatible with the ECHOMAP series.
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