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4 GMR 21/41 Owner’s Manual
basIc oPeratIon > radar Page
2. Using the ROCKER, highlight the function you want to add or
remove, and press ENTER. Only functions with a check mark
in the check box next to them appear on the 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.