Sonar Frequencies; Selecting The Transducer Frequency; Creating A Frequency Preset; Turning On The A-Scope - Garmin Volvo Penta Glass Cockpit B7 Owner's Manual

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 device
and trandsucers 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.
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 with in ½ 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.
You can select which frequencies appear on the sonar
screen.
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 with in ½ mile of an orca whale pod. It is your
Sonar Fishfinder
NOTICE
NOTICE
responsibility to use the device in compliance with all
applicable laws and ordinances.
1 From a sonar view, select Menu > Frequency.
2 Select a frequency suited to your needs and water
depth.
For more information on frequencies, see
Frequencies, page 41.

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 Menu > Frequency.
2 Select Manage Frequencies > New Preset.
3 Enter a frequency.

Turning On the A-Scope

NOTE: This feature is available in the Traditional sonar
views.
The a-scope is a vertical flasher along the right side of the
view, showing you what is underneath the transducer right
now. You can use the a-scope to identify target returns
that may be missed when the sonar data is quickly
scrolling across the screen, such as when your boat is
moving at high speeds. It can also be helpful for detecting
fish that are close to the bottom.
The a-scope above shows fish returns
bottom return .
1 From a sonar view, select Menu > Sonar Setup >
Appearance > A-Scope.
2 If necessary, select
of time the sonar returns are displayed.

Panoptix Sonar Setup

Zooming in a Panoptix LiveVü or LiveScope Sonar
View
You can zoom in on the Panoptix LiveVü and LiveScope
2D sonar views.
Sonar
and a soft
Peak Hold to adjust the length
41