Sonar Gain
The gain setting controls the sensitivity of the sonar receiver to
compensate for water depth and water clarity. Increasing the
gain shows more detail, and decreasing the gain reduces screen
clutter.
NOTE:
Setting the gain on one sonar view applies the setting to
all the views.
Setting the Gain Automatically
NOTE:
To set the gain on the split-frequency screen, you must
set each frequency separately.
1
From a sonar view, select
GAIN
.
2
Select >
Enable Auto Gain
.
3
Select an option:
• To display higher-sensitivity, weaker sonar returns with
more noise automatically, select
Auto High
.
• To display medium-sensitivity sonar returns with moderate
noise automatically, select
Auto Med
.
• To display lower-sensitivity sonar returns with less noise
automatically, select
Auto Low
.
Setting the Gain Manually
1
From a sonar screen, select
GAIN
.
2
Select or until you begin to see noise in the water
portion of the screen.
3
Select or to decrease the gain.
Adjusting the Range of the Depth Scale
You can adjust the range of the depth scale that appears on the
right side of the screen. Automatic ranging keeps the bottom
within the lower third of the sonar screen, and can be useful for
tracking the bottom where there are slow or moderate terrain
changes.
When the depth changes dramatically, like a drop off or cliff,
manually adjusting the range allows a view of a specified depth
range. The bottom is shown on the screen as long as the bottom
is anywhere within the manual range established.
1
From a sonar screen, select
RANGE
.
2
Select an option:
• To allow the device to adjust the range automatically
based on the depth, select Auto Range.
• To increase or decrease the range manually, select or
.
NOTE:
From a sonar screen, select and to quickly
manually adjust the range.
Sonar Setup
NOTE:
Not all options and settings apply to all models, sounder
modules, and transducers.
Showing and Adjusting the Depth Line
You can show and adjust a horizontal line on a sonar screen.
The depth of the line is indicated on the right side of the screen.
NOTE:
Showing a depth line on one screen displays the depth
line on all the screens.
1
From a sonar screen, select
MENU
>
Sonar Setup
>
Depth
Line
.
2
Select
MENU
.
3
To adjust the
Depth Line
, select or .
Setting the Scroll Speed
You can set the rate at which the sonar image moves across the
screen. A higher scroll speed shows more detail, especially
while moving or trolling. A lower scroll speed displays sonar
information on the screen longer. Setting the scroll speed on
one sonar view applies to all the sonar views.
1
From a sonar view, select
MENU
>
Sonar Setup
>
Scroll
Speed
.
2
Select an option:
• To adjust the scroll speed automatically using speed-over-
ground, select
Auto
.
The Auto setting selects a scroll rate to match the boat
speed, so targets in the water are drawn with the correct
aspect ratio and appear less distorted.
6
Sonar
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