The Furuno M1815 has automatic gain reduction that makes use of algorithms that have been refined over many decades of Furuno experience and innovation. This means the 1815 is second to none in clutter rejection. With no input from the user, this Radar will automatically eliminate unnecessary echoes and present a clear display image with every sweep of its antenna. This ensures that you will be able to acquire other vessels, buoys and objects on the sea surface in good weather, or when sudden fog and storms make the visibility poor. Other display modes include Off Center, allowing own ship's position to be shifted to a pre-registered point on screen, and Zoom, which will expand and display a selected target up to 2x in a zoom window. Furuno’s Fast Target Tracking (TT) function allows the user to manually or automatically track up to 10 targets. After selecting a target, it takes only seconds for a speed and course vector to be displayed, making quick work of determining the safety of approaching or moving targets. When using Furuno’s proprietary True Trail mode, moving objects will show a gradation of target trails in their wake, making it possible to gauge the movement of targets at-a-glance. When connected to a Furuno AIS, up to 100 targets can be tracked and displayed on the screen, allowing the operator to instantly gather important information about other AIS-equipped vessels nearby. The 1815 also utilizes Furuno’s True View mode to make reading the display more intuitive. For example, when your vessel is turning, the echoes stay consistent on the display, so you can constantly see the targets on the screen, without waiting for them to update after the turn. This mode proves to be especially useful when you are turning to avoid hazardous targets.