Garmin GMR 404/406 Radar Pedestal GMR 404/406 Owner's Manual - Page 10

Basic Operation > Radar Page Using the Radar Adjustment Menu Use the Radar adjustment menu to access the settings and features most commonly used on the Radar Page including: Gain, Sea Clutter, Rain Clutter, FTC, Zoom, Target Expansion, Trails, Guard Zone, VRM/EBL, MARPA, and Hide/Show Navigation Features. To select an adjustment option from the Radar Page 1. Press ADJ/MENU to open the Radar adjustment menu. 2. Press up or down on the ROCKER to highlight the option you want to change, and then press ENTER. To change a Radar adjustment menu setting: 1. Select an adjustment menu option using the method described previously. 2. Press up or down on the ROCKER to change the setting, range, or percentage. 3. Press ENTER to accept the change, or press QUIT to close the Radar adjustment menu. Gain Gain controls the sensitivity of the Radar receiver. Auto (default) is the recommended setting. It automatically adjusts the gain to provide optimal performance. You can also set gain manually. To see more detail, increase the receiver sensitivity by selecting a higher gain. If there is too much detail, or the screen is cluttered, lower the sensitivity (lower the gain) to increase the clarity of the screen. Sea Clutter Sea Clutter controls unwanted screen clutter caused by choppy sea conditions. The slider has three preset positions: Calm, Moderate, and Rough. Rain Clutter Rain Clutter controls unwanted screen clutter caused by rain at close ranges (use the slider to select 1-100%).  GMR 404/406 Owner's Manual