Meet the Garmin GMR436 xHD3 4 kW 6' Open-Array Radar — a high-performance marine radar designed for serious captains who demand precision, clarity, and reliability. With advanced scan averaging and target-size processing, this radar filters sea clutter and interference to deliver clean, actionable targets across every range.

Key capabilities at a glance

• Scan Averaging Technology — reduces noise and sea clutter for clearer, more consistent targets, even in rough conditions.
• Pulse Expansion & Target-Size Processing — optimizes object shapes on screen for easy interpretation at all ranges.
• Open-Array Performance — 6' (183 cm) antenna with 1.1° horizontal beamwidth and 23° vertical beamwidth for precise detection.
• Fast Redraw — 24 or 48 RPM rotation speeds combined with impressive range up to 72 nm on the 4 kW model.
• Split-Screen Dual-Range Display — independently set near and far ranges on a single radar, with optional overlay on your chartplotter.
• Overlay & Dual-Radar Support — see radar data directly on your chartplotter map; redundancy across displays for reliability.
• Dynamic Sea & Auto Gain — automatically adjusts for calm, moderate, or rough seas to maintain optimal targets and reduce clutter.
• Bird Detection & MARPA Target Tracking — locate surface flocks and track up to 30 targets for collision avoidance (with compatible sensors).
• Industrial-Grade Durability — 100-knot wind rating (with optional voltage converter upgrade) and rugged IPX6 weather protection.

Designed for fast, confident decisions, the GMR436 xHD3 draws data from multiple sources to deliver reliable navigation support and enhanced situational awareness. Its shadowless target presentation helps identify moving vessels and potential threats quickly, while the historical trail keeps a visible record of boats' movements to separate relative motion from actual targets.

With dual-radar support, you can enjoy redundancy across displays, ensuring you stay informed even if one data source is momentarily unavailable. The radar’s narrow horizontal beamwidth and high antenna gain enable you to pick out distant targets with clarity, while the trail and overlay capabilities keep your chartplotter view clean and intuitive.

Ideal use cases

• Commercial and offshore vessels requiring robust performance in challenging seas
• Recreational captains who value precise target detection and reliable collision avoidance
• Vessels needing redundant radar data for added safety and peace of mind

What's in the box

• GMR xHD3 4 kW pedestal
• GMR xHD3 6' Antenna
• Power cable (15 m / 49.21 ft)
• Network cable (15 m / 49.21 ft)
• Mounting hardware kit and template
• Installation instructions