Garmin GMR Fantom 18x Solid-State Doppler Radar Dome — White
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Garmin GMR Fantom 18x Solid-State Doppler Radar Dome
The GMR Fantom 18x is Garmin’s compact 18-inch solid-state Doppler radar dome, delivering powerful target detection and situational awareness in a space-efficient package. With MotionScope Doppler technology, it distinguishes moving targets from stationary clutter — highlighting vessels, birds, and weather in real time on a compatible Garmin chartplotter. Solid-state technology means instant-on operation, lower power consumption, and no magnetron to replace.
Key Features
- Solid-State Doppler Technology — No magnetron; instant-on operation, lower power draw, and longer service life compared to traditional magnetron radar
- MotionScope Doppler — Uses the Doppler effect to detect and highlight moving targets — other vessels, birds, and precipitation — in a distinct colour overlay on the radar display
- 18-Inch Radome — Compact dome form factor suitable for vessels where a larger open-array antenna is impractical; ideal for powerboats and sailboats with limited mast or arch space
- 40W Equivalent Transmit Power — High-performance solid-state output for reliable target detection at range
- Up to 48 Nautical Mile Range — Extended range capability for offshore and coastal passage-making
- Garmin Marine Network Compatible — Connects directly to compatible Garmin GPSMAP and Axiom chartplotters via Garmin Marine Network cable; no additional interface required
- NMEA 2000 Compatible — Integrates with NMEA 2000 network for system-wide data sharing
- Dynamic Auto Gain — Automatically adjusts gain for optimal target presentation in changing sea and weather conditions
- White Radome Housing — Standard white finish for clean integration with most vessel superstructures
Parts Desk Insights
Best Use Case: The GMR Fantom 18x is the ideal radar for mid-size to larger powerboats and sailboats (typically 28 ft+) running a Garmin helm system where a compact dome is preferred over an open-array antenna. The solid-state Doppler and MotionScope technology make it particularly well-suited for vessels operating in busy shipping lanes, areas with heavy bird activity, or where weather radar overlay is a priority. Pairs directly with Garmin GPSMAP and Axiom chartplotters via Garmin Marine Network for seamless radar overlay on the chart display. Step up to an open-array antenna if maximum range and bearing resolution are the priority; the 18x dome is the right choice when installation space is the constraint.
Installation Notes: Requires a Garmin Marine Network cable connection to a compatible Garmin chartplotter (cable sold separately). Requires 12V DC power. Mount on a radar arch, mast, or hardtop with a clear 360° view. Minimum safe distance from crew areas must be observed during operation — refer to Garmin installation manual for exclusion zone specifications. Pedestal mount hardware included.
Compatibility: Compatible with Garmin GPSMAP and Axiom series chartplotters with Garmin Marine Network support. Confirm chartplotter compatibility on the Garmin website before ordering. Garmin Marine Network cable sold separately.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.