The Garmin GMR 18 HD+ is a compact, high-definition 18‑inch marine dome radar designed to boost situational awareness on board even when space is limited. With 4 kW of transmit power, it delivers sharp echo definition over all ranges, helping you detect and avoid maritime traffic effectively. Its streamlined design supports easy installation and intuitive use, while automatic gain and sea‑clutter filtering adapt in real time to changing sea and weather conditions. The radar supports overlay on your chartplotter’s map page and works with optional heading sensors or autopilots for better integration, making it a reliable choice for both recreational and commercial vessels.