Lowrance x52 ユーザーズマニュアル

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However, you might consider experimenting with chart speed when you
are stationary or drifting very slowly. You may sometimes achieve
better images as you slow down the chart speed to match how fast you
are moving across the bottom.
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.
The Chart Speed Control Bar.
If you do 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 
C
HART 
S
PEED
|
ENT
.
2. The Chart Speed Control Bar appears. Press 
↓ to decrease chart
speed; press 
↑ to increase chart speed.
3. When it's set at the desired level, press 
EXIT
.
Grayline
 
Grayline
 
lets you distinguish between strong and weak echoes. It
"paints" gray on targets that are stronger than a preset value. This
allows you to tell the difference between a hard and soft bottom. For
example, a soft, muddy or weedy bottom returns a weaker signal which
is shown with a narrow or no gray line. A hard bottom returns a strong
signal which causes a wide gray line.