Garmin GMR xHD3 Radar Dome, 4 kW Peak, 11-32V DC, IPX7, 48 nm

Overview

The Garmin GMR xHD3 is a 4 kW dome radar with a 48 nm maximum range that runs on 11 to 32 V DC and connects to a compatible Garmin chartplotter or MFD through the Garmin Marine Network. It is available in 18 inch and 24 inch radome sizes and carries an IPX7 water rating.

On the screen, you can run split-screen dual range, overlay radar on your chart, and use features like scan averaging and target-size processing to keep returns readable when sea clutter and interference start to build. Rotation speeds up to 60 rpm help keep target updates moving fast, which matters when you are threading a busy channel or tracking a squall line.

Anglers can use bird detection with Auto Bird Gain, and skippers who want tracking tools can use MARPA target tracking for up to 30 targets when a suitable heading sensor is on the system. This radar is a good match for boats already built around a Garmin networked helm and for crews who want one antenna to cover close-quarters work and longer-range awareness.

Key features

• 4 kW transmit power with 48 nm maximum range and 20 m minimum range
• 11 to 32 V DC input for 12 V and 24 V systems
• Typical power draw: 15 W standby and 40 W transmitting (normal mode)
• Up to 60 rpm antenna rotation for quicker target updates
• Split-screen dual range plus radar overlay on compatible displays
• Scan averaging, dynamic auto gain, and dynamic sea filter to manage clutter as conditions change
• True echo trails for motion history on targets
• Auto Bird Gain and bird detection for finding surface activity
• MARPA target tracking for up to 30 targets (requires an appropriate heading sensor)
• Guard zone alarms and range/bearing cues for quick situational checks
• IPX7 water rating for incidental water exposure

Variants

This radar dome is offered in multiple configurations based on radome size.

The size option changes the physical footprint, antenna length, and horizontal beam width. Core electrical specs and feature set remain the same across the 18 inch and 24 inch versions, including 4 kW output, 48 nm maximum range, and 11 to 32 V DC power input.

• 010-02841-00: Size 18" (20" x 9.8", 7.0 kg, 17" antenna length, 5.2° horizontal beam width). This option keeps the mounting footprint smaller on hardtops, arches, and sailboat structures where space is limited.
• 010-02842-00: Size 24" (25.4" x 9.8", 8.7 kg, 23" antenna length, 3.7° horizontal beam width). The narrower horizontal beam width can help separate targets more clearly at range on the display.

What’s included

• GMR 18 or 24 xHD3 dome radar (depending on model selected)
• Power cable (15 m / 49.21 ft)
• Network cable (15 m / 49.21 ft)
• Garmin Marine Network Adapter Cable Small (Male) to Large (15 cm)
• Mounting hardware kit and template
• Installation instructions

Installation and setup

Plan the mounting location so the radome has a clear view with minimal blockage from masts, spreaders, lights, and other hardware. The base should be flat and parallel to the vessel waterline, with structure underneath that can support the radar weight and vibration loads. On some hardtops, raising the radar helps keep the roof edge from shading the beam.

Keep clear of magnetic compasses by maintaining at least 1.1 m separation for the 18 inch model and 0.95 m for the 24 inch model. Route cables with chafe protection, seal deck penetrations with marine sealant, and secure the run so it will not work loose over time.

Electrical and network integration

Power is 11 to 32 V DC, with a typical 7.5 A fuse requirement on the supply. Standby draw is 15 W, and typical transmitting draw in normal mode is 40 W, so the radar can stay available without heavily loading the house system.

Network connection is through the Garmin Marine Network to a compatible chartplotter or MFD. Radar overlay and MARPA functions require appropriate sensors on the boat, and dual radar support allows redundancy when multiple radar sources are installed.

Maintenance and care

Rinse the radome with fresh water after salt use and keep the outer surface free of heavy grime that can hold salt. Periodically check mounting fasteners, cable condition, and strain relief points, especially after rough-weather runs or long trailering days.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

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Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

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Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

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