Description
The Garmin GMR™ 18 HD3 is a compact, powerful and user-friendly 18-inch radome marine radar that brings high-definition target detection, strong performance and reliable operation to your boat in every situation. It is an ideal choice for smaller motorboats and larger yachts alike, where a clear radar picture and confident navigation in poor visibility matter.
The HD3 series offers updated magnetron technology, better target separation and smart automatic set-up that adapts the radar to the conditions – so you can focus on safe navigation.
Key features
- 4 kW output – a strong, clear radar picture even at long range.
- Maximum range up to 36 nm – for coastal and offshore navigation.
- Compact 18" radome – easy to install even on smaller boats.
- Dynamic auto gain and sea filter – sensitivity and clutter filters adjust automatically to sea conditions.
- MARPA target tracking – helps detect and track other vessels (requires a separate heading sensor).
- Dual radar support – use two radars in parallel for different displays on the same boat.
- Radar overlay – radar information can be shown directly on the chartplotter chart.
- Quiet, low-power operation – fixed 24 rpm rotation for smooth, unobtrusive use.
- 8-bit true colour separation – better target separation and less screen noise.
Specifications
- Operating voltage: 11–32 V DC
- Power: 4 kW
- Radome diameter: 20" (508 mm)
- Height: approx. 25 cm
- Weight: approx. 7 kg
- Water rating: IPX7
- Rotation speed: 24 rpm
- Horizontal beam width: approx. 5.2°
- Minimum range: 20 m
- Maximum range: 36 nm
- Network: Garmin Marine Network
- Mounting: universal, fits most radome mounts
Ideal for
- Coastal and inland boating
- Navigating in poor weather or visibility
- Small and medium-sized yachts, motorboats and workboats
- Chartplotters using the Garmin Marine Network
In the box
- GMR™ 18 HD3 radome
- Power cable
- Network cable
- Mounting kit
- Manuals



