This listing is for a Garmin GMR18HD 4kw Radar Dome
The dome is sold used and in great condition with only some wear from a previous install
We fully tested this unit and updated it to the latest software version (3.60).
This radar had great target returns during testing and ran several hours with no issues.
The Garmin decals show minor chipping. See photos for cosmetic conditions.

This 18″ 4 kW high-definition radar has a 36 nm range, bringing radar images into even clearer focus. With automatic pulse optimization technology, the radar matches pulse widths and repetition rates with the selected nautical mile range. Combine that with the antenna’s 5-degree beam width, and you’re looking at the best weather penetration and target definition in its class.
To help you avoid traffic on the water, the GMR 18 HD provides MARPA target tracking when combined with a multi-function display and an optional heading sensor. MARPA tracking allows you to track the bearing, course, and speed and predict the closest approach to up to 10 targets.

**Garmin Radar Disclaimer: **
Max Marine Electronics believes in full transparency; We sell Garmin radars due to overwhelming demand from customers. Garmin builds a suite of extremely easy to use, and for the most part, reliable marine electronics products. Their radars are a rare exception. We have always done our best to supply the best product we can, but there are factors beyond our control. These factors include the fact that Garmin radars have a disproportionately high rate of failure, are made with mediocre aluminum alloys (open array radars only), and that all but the latest/current production XHD2 (open array radars) and XHD (dome radars) are no longer serviced by Garmin and parts are no longer available.

The disproportionately high rate of failure is well documented online. Our radars are tested to ensure full functionality at the time of sale and come with a 90-day warranty. The aluminum alloy issue is also well documented – the aluminum oxidizes which cause the factory powder coating to blister. This is unattractive and can cause water intrusion when the blistering occurs in the case-seal area of the pedestal. We strip, bead blast, and powder coat nearly every Garmin pedestal we sell. Because the degradation of the aluminum leaves small artifacts in the surface of the aluminum, some of those artifacts will show through on the powder coating. Furthermore, because of the aluminum alloys used in manufacturing, there may be small areas of off gassing that are left in the powder coating process. Lastly, Garmin no longer supports or produces parts for any radars that are not current production. This includes the original GMR40X, all XHD pedestals, and all non-XHD domes.

This means that after the Max Marine Electronics’ 90-day warranty (the same warranty Garmin gives to factory repaired products), there is no resource for these radars to be serviced. We certainly hope and expect the radars will last well beyond the warranty period, and we have put a lot of time into trying to make the best of the situation with these radars. We believe that if buying a used Garmin radar, buying one of ours will give buyers the best shot at a reasonable service life