Selecting Frequencies; Creating A Frequency Preset; Adjusting The Zoom On The Sonar Screen - Garmin AQUAMAP 10x2 Series Owner's Manual

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 sonar black boxes and 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
AQUAMAP™ 10x2/12x2 SERIES
you to see deeper with the lower frequency return and, at the same time, see
more detail from the higher frequency return.

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 MENU > Frequency.
2 Select an option:
• To use CHIRP frequencies, select Chirp.
• To detect and judge the bottom condition, select 50.0 kHz.
• To detect schools of fish at the bottom on the edges, select 95.0 kHz.
• For detailed observations, select 200.0 kHz.

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.

Adjusting the Zoom on the Sonar Screen

1 From an applicable sonar view, select MENU > Zoom.
2 Select an option:
• To set the depth range of the magnified area manually, select Set
Zoom, turn the knob to set the depth range of the magnified area,
select Zoom In or Zoom Out to increase or decrease the magnification
of the magnified area,
• To set the zoom range automatically, select Set Zoom > Auto.
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