Sharpen your radar picture with high definition performance. The GMR 18 HD radar offers a whole new level of radar scanning capability.

Get Powerful Performance

The GMR 18 HD features high-powered Digital Signal Processing, providing sharper radar imagery and improved target separation.

This 18-inch, 4-kilowatt high definition radar has a 36 nm range, bringing radar images into even clearer focus. Combine that with the antenna's 5.0 degree beamwidth, and you're looking at the best weather penetration and target definition in its class.

To help you avoid traffic on the water, the GMR 18 HD provides MARPA target display and an optional heading lti-function sensor. MARPA tracking allows you to track the bearing, course, speed and predicted closest approach of up to 10 targets. In addition, like all Garmin radars, the GMR 18 HD has self-contained signal processing, which provides you with a more precise, easy to read signature.

Connect to the Garmin Marine Network
The GMR 18 HD transmits data over the Garmin Marine Network, a 100-megabit plug-and-play proprietary network that gives you the ability to expand your boat's system as needed. Once connected to the network, you can use any network-compatible Garmin chartplotter as your radar screen. And as an aid to locational awareness, you can overlay the GMR 18 HD radar image on the chartplotter's map page. You can also split the on-screen display so that you can view the map and the standard radar page simultaneously.

Physical & Performance:
Unit dimensions, WxHxD: 18" diameter, 8.9" high (45.7 cm diameter, 22.6 cm high)
Weight: 15.8 lb (7.2 kg)
Waterproof: yes (IPX7)
Antenna sweep: 24/30 rpm (dual rotation)
Transmit power: 4 kW
Power input: 10.5-35 Vdc, 33.5 W
Beam width: 5.0ø horizontal, 25ø vertical
Maximum range: 36 nm
Minimum range: 20 meters
RoHS version available: yes
Features:
Garmin Marine Network™ compatible: yes
MARPA target tracking (collision avoidance): yes (requires heading sensor; sold separately)
Guard zone alarm: yes
Additional: High definition (outstanding target separation with less screen clutter)
Redesign connector with removable collar