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Garmin VOLVO PENTA GLASS COCKPIT GPSMAP 7600 Manual

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6
Select Playback.
Traditional, Garmin ClearVü, and SideVü
Sonar Setup
NOTE: Not all options and settings apply to all models and
transducers.
NOTE: These settings do not apply to Panoptix transducers.
From a sonar view, select Menu > Sonar Setup.
Scroll Speed: Sets the rate at which the sonar scrolls from right
to left (Setting the Scroll Speed, page 28).
In shallow water, you can select a slower scroll speed to
extend the length of time the information is displayed on
screen. In deeper water, you can select a faster scroll speed.
Automatic scroll speed adjusts the scrolling speed to the
speed the boat is traveling.
Noise Reject: Reduces the interference and the amount of
clutter shown on the sonar screen (Sonar Noise Rejection
Settings, page 28).
Appearance: Configures the appearance of the sonar screen
(Sonar Appearance Settings, page 29).
Alarms: Sets sonar alarms (Sonar Alarms, page 29).
Advanced: Configures various sonar display and data source
settings (Advanced Sonar Settings, page 29). Not
applicable to Garmin ClearVü or SideVü sonar views.
Installation: Configures the transducer (Traditional, Garmin
ClearVü, and SideVü Transducer Installation Settings,
page 29).
Setting the Zoom Level on the Sonar Screen
1
From a sonar view, select Menu > Zoom > > Mode.
2
Select an option:
• To set the depth and zoom automatically, select Auto.
If necessary, select Set Zoom to modify the zoom setting.
Select View Up or View Down to set the depth range of
the magnified area, and select Zoom In or Zoom Out to
increase or decrease the magnification of the magnified
area.
• To set the depth range of the magnified area manually,
select Manual.
If necessary, select Set Zoom to modify the zoom setting.
Select View Up or View Down to set the depth range of
the magnified area, and select Zoom In or Zoom Out to
increase or decrease the magnification of the magnified
area.
• To magnify one particular area of the screen, select
Magnify.
If necessary, select Magnify to increase or decrease the
magnification level.
TIP: You can drag the magnification box to a new location
on the screen.
• To zoom in on the sonar data from the bottom depth,
select Bottom Lock.
If necessary, select Span to adjust the depth and
placement of the bottom lock area.
To cancel the zoom, deselect the Zoom option.
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 until there is no
additional detail to show, at which point it starts stretching out
the existing detail. This can be useful while moving or trolling, or
when you are in very deep water where the sonar is pinging very
slowly. A lower scroll speed displays sonar information on the
screen longer.
For most situations, the Default setting provides a good balance
between a quickly scrolling image and less distorted targets.
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 or water speed data, 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 or searching for
structure, it is recommend to use the Auto setting.
• To scroll faster, select Up.
• To scroll more slowly, select Down.
Adjusting the Range of the Depth or Width Scale
You can adjust the range of the depth scale traditional and
Garmin ClearVü sonar views and the range of the width scale
for the SideVü sonar view.
Allowing the device to adjust the range automatically keeps the
bottom within the lower or outer third of the sonar screen, and
can be useful for tracking a bottom that has minimal or moderate
terrain changes.
Manually adjusting the range enables you to view a specified
range, which can be useful for tracking a bottom that has large
terrain changes, such as a drop-offs or cliffs. The bottom can
appear on the screen as long as it appears within the range you
have set.
1
From a sonar view, select Menu > Range.
2
Select an option:
• To allow the chartplotter to adjust the range automatically,
select Auto.
• To increase or decrease the range manually, select Up or
Down.
TIP: From the sonar screen, you can select or to
manually adjust the range.
TIP: When viewing multiple sonar screens, you can select
Select to choose the active screen.
Sonar Noise Rejection Settings
From a sonar view, select Menu > Sonar Setup > Noise
Reject.
Interference: Adjusts the sensitivity to reduce the effects of
interference from nearby sources of noise.
The lowest interference setting that achieves the desired
improvement should be used to remove interference from the
screen. Correcting installation issues that cause noise is the
best way to eliminate interference.
Color Limit: Hides part of the color palette to help eliminate
fields of weak clutter.
By setting the color limit to the color of the undesired returns,
you can eliminate the display of undesired returns on the
screen.
Smoothing: Removes noise that is not part of a normal sonar
return, and adjusts the appearance of returns, such as the
bottom.
When smoothing is set to high, more of the low-level noise
remains than when using the interference control, but the
noise is more subdued because of averaging. Smoothing can
remove speckle from the bottom. Smoothing and interference
work well together to eliminate low-level noise. You can
adjust the interference and smoothing settings incrementally
to remove undesirable noise from the display.
Surface Noise: Hides surface noise to help reduce clutter.
Wider beam widths (lower frequencies) can show more
targets, but can generate more surface noise.
28 Sonar Fishfinder
… 36 …


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