10 m, the device displays an magnified area from the bottom of
the water to 10 m above the bottom.
1
From a sonar screen, select
>
Zoom
.
2
Select an option:
• Select
Bottom Lock
to lock the screen to the water
bottom.
• Select
Manual
to manually set the zoom.
• Select
Auto
to automatically set the zoom.
• Select
Split Zoom
to turn on the split-zoom view.
Locking the Screen to the Water Bottom
You can lock the screen to the water bottom. For example, if you
select a span of 20 meters, the device shows an area from the
water bottom to 20 meters above the bottom. The span appears
on the right side.
1
From a sonar view, select
>
Zoom
>
Bottom Lock
.
2
Select a span.
Sonar Frequencies
NOTE:
The frequencies that are available depend on the
transducer being used.
Adjusting the frequency helps adapt the sonar for your particular
goals and the present depth of the water.
Selecting Frequencies
NOTE:
You cannot adjust the frequency for all sonar views and
transducers.
You can indicate which frequencies appear on the sonar screen.
1
From a sonar view, select
>
Frequency
.
2
Select a frequency suited to your needs and water depth.
For more information on frequencies, see
Sonar
Frequencies
, page 4
.
Creating a Frequency Preset
NOTE:
Not available with all transducers.
You can create a preset to save a specific sonar frequency,
which allows you to change frequencies quickly.
1
From a sonar view, select
>
Frequency
.
2
Select
Add
.
3
Enter a frequency.
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
Select
>
Gain
.
2
Select
Enable Auto Gain
, if applicable.
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.
• To increase or decrease the range manually, select or
. (Available only on the 5 in. and 7 in. models.)
• To increase or decrease the range manually, select or .
(Available only on the 4 in. models.)
NOTE:
From a sonar screen, select and to quickly
manually adjust the range. (Available only on the 5 in. and
7 in. models.)
From a sonar screen, select and to quickly resume auto
range. (Available only on the 5 in. and 7 in. models.)
From a sonar screen, select or to quickly adjust the range.
(Available only on the 4 in. models.)
Setting the range on one screen applies that setting to all
screens.
Sonar Setup
NOTE:
Not all options and settings apply to all models 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
>
Sonar Setup
>
Depth
Line
.
2
Select
.
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
>
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. When viewing
Garmin ClearVü or SideVü sonar views, it is recommend
to use the Auto setting.
• To use a very fast scroll speed, select Ultrascroll
®
.
The Ultrascroll option quickly scrolls new sonar data, but
with a reduced image quality. For most situations, the Fast
4
Sonar
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