Eagle Electronics 640c Fish Finder User Manual


 
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Chart Speed
The rate echoes scroll across the screen is called chart speed. The de-
fault is maximum. We recommend you keep the default setting for most
all fishing conditions.
You may consider experimenting with chart speed when you are sta-
tionary or drifting slowly. Sometimes the unit will display better im-
ages when chart speed is adjusted to match the speed of your boat.
If you are at anchor, ice fishing or fishing from a dock, experiment with
a chart speed around 50 percent. If you are drifting slowly, try a chart
speed around 75 percent. When you are stationary and a fish swims
through the sonar signal cone, the image appears on the screen as a
long line instead of a fish arch. Reducing the chart speed may result in
a shorter line that more closely resembles a regular fish return.
Sonar Page menu with Chart Speed command selected (left).
Chart Speed Control Bar (right).
If you experiment with chart speed, remember to reset it to maximum
when you resume trolling or moving across the water at higher speed.
To change chart speed:
1. From the Sonar Page, press
MENU| to CHART SPEED|ENT.
2. The Chart Speed Control Bar appears. Press to decrease chart
speed. Press to increase chart speed.
3. When it is set at the desired level, press
EXIT.
ColorLine
ColorLine lets you distinguish between strong and weak echoes. It
paints a brighter color on targets that are stronger than a preset value.
This allows you to tell the difference between a hard and soft bottom.