2 GPSMAP 3206/3210 Owner’s ManualusIng radar > radar PageradarUsing the Radar Adjustment MenuUse the Radar adjustment menu to access the settings and features mostcommonly used on the Radar Page including: Gain, Sea Clutter, Rain Clutter,FTC, Zoom, Target Expansion, Trails, Guard Zone, VRM/EBL, MARPA, andHide/Show Navigation Features.To select an adjustment option from the Radar Page1. Press ADJ/MENU to open the Radar adjustment menu.2. Press up or down on the ROCKER to highlight the option you want tochange, 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, orpercentage.3. Press ENTER to accept the change, or press QUIT to close the Radaradjustment menu.GainGain controls the sensitivity of the Radar receiver. Auto (default) is therecommended setting. It automatically adjusts the gain to provide optimalperformance. You can also set gain manually. To see more detail, increase thereceiver sensitivity by selecting a higher gain. If there is too much detail, or thescreen is cluttered, lower the sensitivity (lower the gain) to increase the clarity ofthe screen.Sea ClutterSea Clutter controls unwanted screen clutter caused by choppy sea conditions.The slider has three preset positions: Calm, Moderate, and Rough.Rain ClutterRain Clutter controls unwanted screen clutter caused by rain at close ranges (usethe slider to select 1-100%).FTC (Fast Time Constant)FTC controls unwanted screen clutter caused by rain at a distance. The Fast TimeConstant has four settings: Off, low, Medium, and high.
