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GMR 21/41 Owner’s Manual 13
basIc oPeratIon > radar tab
Advanced Sub Tab
Use the Advanced sub tab to set the AFC Mode and the front of boat
offset.
The available Advanced sub tab settings are:
•
AFC Mode—sets how the scanner frequency is adjusted.
Select Auto to automatically adjust the scanner frequency for
optimal performance (recommended). Select Manual to set the
frequency manually.
To manually adjust the scanner frequency:
1. Highlight the AFC Mode eld, and press ENTER.
2. Select Manual, and press ENTER.
3. Highlight the Freq button to the right of the AFC Mode eld,
and press ENTER.
NOTE: The Freq button is available only available if Manual is
selected in the AFC Mode eld.
4. Press up or down on the ROCKER to adjust the scanner
frequency.
5. Press ENTER to accept the frequency change.
NOTE: The Signal Strength bar graph is damped and may be
slow when responding to frequency tuning changes.
• Signal Strength—Shows the strength of the radar signal.
•
Front of Boat Offset—allows you to offset the front of the
boat if you mount the radar at an angle.