•
sets the alarm to sound when fish of all sizes
are detected.
•
sets the alarm to sound only when medium or
large fish are detected.
•
sets the alarm to sound only when large fish are
detected.
Advanced Sonar Settings
From a Traditional sonar view, select
Options
>
Sonar
Setup
>
Advanced
.
Shift
: Allows you to set the depth range on which the
sonar is focused. This allows you to zoom in a higher
resolution in the focused depth.
When using shift, bottom tracking may not work
effectively, because the sonar looks for data within
the depth range of the focused area, which may not
include the bottom. Using shift also can impact the
scroll speed, because data outside the depth range
of the focused area is not processed, which reduces
the time required to receive and display the data. You
can zoom in to the focused area, which enables you
to evaluate target returns more closely at a higher
resolution than just zooming alone.
Btm. Srch. Limit
: Limits the search for the bottom to
the depth selected when the Range setting is set to
Auto. To minimize the length of time it takes to find the
bottom, you can select a depth to limit the search for
the bottom. The device will not search for the bottom
deeper than the selected depth.
Transducer Installation Settings
These settings apply to the following types of sonar.
• Traditional
• Garmin ClearVü
• Garmin SideVü
From an applicable sonar view, select an option.
• From a Traditional sonar view, select
Options
>
Sonar
Setup
>
Installation
.
• From a Garmin ClearVü sonar view, select
Options
>
ClearVü Setup
>
Installation
.
• From a Garmin SideVü sonar view, select
Options
>
SideVü Setup
>
Installation
.
Transmit Rate
: Sets the length of time between sonar
pings. Increasing the transmit rate increases the scroll
speed, but it may also increase self-interference.
Reducing the transmit rate increases the spacing
between transmit pulses and can resolve self-
interference. This option is available on the Traditional
sonar view only.
Transmit Power
: Reduces transducer ringing near
the surface. A lower transmit power value reduces
transducer ringing, but can also reduce the strength of
the returns. This option is available on the Traditional
sonar view only.
Filter Width
: Defines the edges of the target. A shorter
filter more clearly defines the edges of the targets but
may allow more noise. A longer filter creates softer
target edges and may also reduce noise. This option is
available on the Traditional sonar view only.
Flip Left/Right
: Switches the SideVü view orientation
from left to right. This option is available on the SideVü
sonar view only.
Restore Sonar Defaults
: Restores the sonar settings to
the factory default values.
Transducers
: Allows you to change the transducer, view
details about the transducers, and save details to a
memory card.
Sonar Frequencies
NOTE:
The frequencies available depend on the
transducers being used.
Adjusting the frequency helps adapt the sonar for your
particular goals and the present depth of the water.
Higher frequencies use narrow beam widths, and are
better for high-speed operation and rough sea conditions.
Bottom definition and thermocline definition can be better
when using a higher frequency.
Lower frequencies use wider beam widths, which can let
the fisherman see more targets, but could also generate
more surface noise and reduce bottom signal continuity
during rough sea conditions. Wider beam widths generate
larger arches for fish target returns, making them ideal for
locating fish. Wider beam widths also perform better in
deep water, because the lower frequency has better deep
water penetration.
CHIRP frequencies allow you to sweep each pulse
through a range of frequencies, resulting in better target
separation in deep water. CHIRP can be used to distinctly
identify targets, like individual fish in a school, and for
deep water applications. CHIRP generally performs better
than single frequency applications. Because some fish
targets may show up better using a fixed frequency, you
should consider your goals and water conditions when
using CHIRP frequencies.
Some transducers also provide the ability to customize
preset frequencies for each transducer element, which
enables you to change the frequency quickly using the
presets as the water and your goals change.
Viewing two frequencies concurrently using the split-
frequency view allows you to see deeper with the lower
frequency return and, at the same time, see more detail
from the higher frequency return.
NOTICE
Always be aware of local regulations on sonar
frequencies. For example, to protect orca whale pods,
you might be prohibited from using frequencies between
50 to 80 khz within
1
/
2
mile of an orca whale pod. It is
your responsibility to use the device in compliance with all
applicable laws and ordinances.
Selecting the Transducer Frequency
NOTE:
You cannot adjust the frequency for all sonar
views and transducers.
Sonar Fishfinder
45
