Garmin GMR 18 HD3 18-Inch Radar Dome for Marine Navigation

GMR 18 HD3 18" Radar Dome

This compact 18" dome radar combines ease of use with powerful scanning features that work to maximize your confidence and situational awareness on the water.

Features:

• 4 KW power output, 36 nautical mile max range


• Space-saving 18" dome


• Marpa target tracking


• Dynamic auto gain and sea filter


• Dual-radar support


• Quiet dome drive motor

Dual-Radar Support

Using dual radar provides redundancy and allows each display unit on the boat to pull data from one of two different radar sources.

Dynamic Auto Gain

Gain automatically adjusts levels to optimum settings.

Dynamic Sea Filter

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

Radar Overlay

Overlay radar images onto your chartplotters map page. You can add an optional autopilot or heading sensor (sold separately) for the best results.

MARPA Target Tracking

MARPA tracks selected targets to help keep track of other vessels and avoid collisions (with appropriate sensors, sold separately).

Low-Noise Scanning

The reliable GMR HD3 dome drive motor spins at a fixed 24 rpm, offering reliable, low-noise operation and minimal power consumption.

Compact and Powerful

4 kW of transmit power, a 36 nautical mile maximum range, and clear echo definition at all ranges.

Close-In Target Scanning

Minimum scanning range of 20 meters for excellent short-range detection and target detail.

High-Resolution Radar

8-bit true color for outstanding target separation with less screen clutter.

Timed Transmit Mode

Specify transmit times down to the seconds to help reduce power consumption.

Intuitive operation

No complex user settings, so its easy to install and start using.

In the Box:

• GMR 18 HD3 dome radar


• Power cable (15 m/49.21 ft)


• Network cable (15 m/49.21 ft)


• Mounting hardware kit and template


• Installation instructions

General:

• Dimensions: 20" diameter, 9.8" high (508 mm diameter, 248 mm high)


• Weight: 7.0 kg


• Waterproof: IPX7


• Antenna length: 17" (43 cm)


• Rotation Speed (RPM): 24 rpm


• Beam Width: 5.2 horizontal, 25 vertical


• Maximum Range: 36 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:

• Overlay: Yes


• Dual Radar Support: Yes


• Auto Gain: Dynamic


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

The Garmin GMR 18 HD3 is a compact yet powerful 18-inch radar dome designed to enhance your situational awareness and safety on the water. Featuring a 4 KW power output and a maximum range of 36 nautical miles, this radar provides clear and detailed target detection even at long distances. Its streamlined design and low-noise drive motor ensure quiet operation and minimal power consumption, making it suitable for various marine vessels. The GMR 18 HD3 integrates advanced features such as dynamic auto gain and sea filter, which automatically adjust radar sensitivity to optimize performance across different sea conditions, from calm to rough. This ensures consistent and reliable detection without manual adjustments, simplifying operation for the user.

One of the key advantages of the Garmin GMR 18 HD3 is its dual-radar support, allowing two radar sources to feed data to your display units for redundancy and enhanced tracking. The radar overlay feature enables you to superimpose radar images onto your chartplotter's map, providing a comprehensive view of your surroundings. When paired with an optional autopilot or heading sensor, this system can optimize route planning and collision avoidance. MARPA target tracking further enhances safety by actively monitoring selected vessels, helping you maintain safe distances and avoid collisions, especially in congested waters.

Designed for ease of use, the Garmin GMR 18 HD3 does not require complex setup procedures, allowing quick installation and immediate operation. Its high-resolution 8-bit true color display offers excellent target separation with minimal clutter, ensuring you can identify objects with precision. The radar features a minimum scanning range of 20 meters for close-in target detection and a timed transmit mode that allows you to specify transmit times to reduce power consumption. Whether you are navigating coastal waters or open sea, this radar dome offers a reliable, high-performance solution that supports your safety and navigation needs efficiently.

Features:

• 4 KW power output with a maximum range of 36 nautical miles

• Space-saving 18-inch radome design

• Marpa target tracking for vessel monitoring

• Dynamic auto gain and sea filter for automatic sensitivity adjustment

• Support for dual radar sources for redundancy

• Quiet dome drive motor for low noise operation

• High-resolution 8-bit true color display for clear target separation

• Minimum scanning range of 20 meters for close-in detection

• Overlay radar images onto chartplotters for integrated navigation

• Timed transmit mode to optimize power consumption