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Calibrate Speed
The speed sensor can be calibrated to compensate for inaccuracies.
Before you change the setting, calculate the percentage the speed is off.
You will enter this percentage in a moment.
If you figure the sensor is reading 10 percent faster than actual speed,
you will enter – 10 in the calibration window. If the sensor is reading 5
percent slower than true speed, enter + 5 in the window.
Perform your test in relatively calm water free of current, if possible.
(Unless, of course, you are taking the current speed into consideration
when making your calculation.) After you have a correction figure,
here's how to enter it:
1. Press
MENU|MENU|↓ to CALIBRATE WATER SPEED|ENT.
2. Enter the number you calculated earlier: press ↑ or ↓ to change the
first character (+ or –), then press → to move the cursor to the next
number and repeat until the percentage is correct, then press
EXIT.
Chart Speed
The rate that echoes scroll across the screen is called the chart speed.
The default is maximum. We recommend you leave the speed set there
for virtually all fishing conditions.
You, however, might consider experimenting with chart speed when
you are stationary or drifting very slowly. You may sometimes achieve
better images as you decrease the chart speed to match how fast you
are traveling across the water.
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.