Eagle FishElite 640c Installation And Operation Instructions Manual page 66

For example, a soft, muddy or weedy bottom returns a weaker signal
which is shown with a narrow, colored line (dark blue tinged with red
or a little yellow.) Since fish are among the weakest echoes, they show
up mostly as blue arches. A hard bottom or other relatively hard target
returns a strong signal which causes a wider brightly colored line (red-
dish yellow to bright yellow.)
If you have two signals of equal size, one with red to yellow color and
the other without, then the target with brighter color (yellow) is the
stronger signal. This helps distinguish weeds from trees on the bottom,
or fish from structure.
ColorLine is adjustable. Experiment with your unit to find the Color-
Line setting best for you.
Sonar Page menu with ColorLine command selected (left).
The ColorLine control bar (right).
To adjust the ColorLine level:
1. From the Sonar Page, press |↓ to | .
MENU C ENT
OLORLINE
2. The ColorLine Control Bar appears. Press ↓ to decrease ColorLine.
Press ↑ to increase ColorLine.
3. When it is set at the desired level, press .
EXIT
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