Garmin GMR 436 xHD3 6 Open Array Radar & Pedestal – 4kW

Description

The Garmin GMR 436 xHD3 is a 4 kW high-definition magnetron open-array marine radar with a six-foot antenna and pedestal. It is designed for compatible Garmin chartplotters using Garmin Marine Network or Garmin BlueNet connectivity, delivering radar coverage from 20 m to a maximum instrumented range of 72 NM. The narrow 1.1-degree horizontal beamwidth of the six-foot array helps distinguish closely spaced shoreline features, vessels, buoys, and other radar targets.

The system includes the 4 kW pedestal, six-foot antenna array, 15 m power cable, 15 m network cable, mounting hardware, and installation template. Features include dual-range operation, scan averaging, Dynamic Sea Filter, dynamic auto gain, echo trails, Bird Gain, and MARPA support when compatible heading and position data are available. The 72 NM range is manufacturer rated; real-world target detection depends on mounting height, target characteristics, radar settings, weather, sea state, and local interference.

Key Specifications

• Four-kilowatt high-definition magnetron open-array marine radar with six-foot antenna and pedestal.
• Provides a maximum instrumented range of 72 NM and a minimum range of 20 m.
• Uses a six-foot open array with 1.1-degree horizontal and 23-degree vertical beamwidth.
• Supports 24 RPM and 48 RPM antenna rotation speeds.
• Includes dual-range operation, scan averaging, Dynamic Sea Filter, dynamic auto gain, echo trails, and Bird Gain.
• Supports MARPA target tracking when compatible heading, GPS, and chartplotter requirements are met.
• Operates from 11V to 32V DC, with approximately 55W typical transmit consumption and 18W standby consumption.
• Includes 15 m power and network cables, measures approximately 1,938 mm across the array, weighs approximately 29.6 kg as a complete pedestal-and-array assembly, and has IPX6 water protection.

Radar Integration

The GMR 436 xHD3 requires a compatible Garmin chartplotter or multifunction display for radar control and video display. Garmin Marine Network or Garmin BlueNet carries radar video and control data; NMEA 2000 supports compatible heading, GPS, AIS, autopilot, and vessel-sensor information but is not the primary radar-video connection.

MARPA tracking and radar overlay require compatible heading and position data. Bird Gain, dual-range monitoring, echo trails, and scan averaging depend on supported display functions and correct configuration. Radar is a navigation aid and does not replace a proper lookout, safe speed, official charts, local notices, or collision-regulation compliance.

Installation Considerations

Mount the pedestal and six-foot rotating array on a rigid, level platform with enough structural capacity and complete rotation clearance. Place the scanner at a practical height above the waterline, align it parallel to the waterline, and keep it clear of crew areas, rigging, masts, antennas, lights, exhaust, and other obstructions. Maintain manufacturer-specified personnel safe distance and compass-safe distance. Route the supplied 15 m power and network cables away from heat, chafe, bilge water, high-current wiring, and moving equipment. Radar installation and commissioning should be completed by a qualified marine-electronics technician.

Warranty and Saltwater Care

Garmin marine warranty coverage varies by region, distributor, proof of purchase, product registration, installation method, and intended use. Confirm the applicable local warranty terms, exclusions, and service process before purchase.

The radar is designed for marine exposure and has IPX6 ingress protection, but this rating does not guarantee immunity from salt spray or galvanic corrosion. Rinse salt deposits with fresh water where appropriate, avoid high-pressure spray at connectors and cable glands, inspect the pedestal, antenna array, mounting hardware, fasteners, and cable seals regularly, and use compatible marine-grade hardware plus manufacturer-approved isolation methods to reduce corrosion risk.

Before Ordering

Confirm compatible Garmin chartplotter support, Garmin Marine Network or BlueNet connection, suitability of the supplied 15 m power and network cables, 11V to 32V supply, six-foot array rotation clearance, mounting-platform strength, mounting height, personnel and compass-safe-distance requirements, heading and GPS sources for MARPA or radar overlay, optional AIS integration, and qualified installation requirements before purchase.