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To change the Grayline level, repeatedly press
MENU
until the
G
RAYLINE
scroll bar appears. Press
↑
to increase Grayline,
↓
to decrease it. Echoes
scrolling on the screen will show the effects of the Grayline adjustment.
If you reach the maximum or minimum level, a tone sounds alerting
you to the limits. Press
PWR
to clear the menu.
Chart Speed
The speed at which echoes scroll across the screen is called the chart
speed. The default for this unit is "max" (100 percent). We recommend
you leave the scroll speed setting there for most all fishing conditions.
Chart Speed scroll bar.
You, however, might consider experimenting with chart speed when
you are stationary or drifting very slowly. Sometimes, you may achieve
better images as you decrease the chart speed to match the speed of
your boat.
If you are at anchor, ice fishing or fishing from a dock, experiment with
a chart speed of 25 percent. If you are drifting slowly, try a chart speed
of 50 percent. When you are stationary and a fish swims through the
sonar signal cone, the image appears on the screen as a long line in-
stead of a fish arch. Reducing the chart speed may result in a shorter
line that more closely resembles a regular fish return.
To adjust Chart Speed, repeatedly press
MENU
until the
C
HART
S
PEED
scroll bar appears. Press
↑
to increase the speed of the chart. Press
↓
to
decrease it. Press
PWR
to clear the menu.
To return to the original setting, repeat the steps above, but use the
arrow keys to set the speed to
100%
before clearing the menu.
Frequency
Your sonar unit can transmit signals at 83 kHz and 200 kHz. The de-
fault frequency is 200 kHz, best used in shallow water (about 300 feet
