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Sonar Menu Tab
Imaging Frequency
(858c HD DI and 958c HD DI only)
Settings: 800 kHz, 455 kHz; Default = 455 kHz
Imaging Frequency
allows you to select which frequency to apply to the
Down Imaging™ beams (455 kHz or 800 kHz). For the best overall image
quality and depth, select 455 kHz. For the sharpest image (but limited depth
capability), select 800 kHz.
Surface Clutter
Settings: Low = 1 to High = 10; Default = 5
Surface Clutter
adjusts the filter that removes surface clutter noise caused
by algae and aeration. The lower the setting, the less surface clutter will be
displayed.
SwitchFire™
Settings: Clear Mode, Max Mode; Default = Clear
Mode
SwitchFire™
controls how the sonar returns are displayed in the Sonar Views.
Choose
Max Mode
to see only raw sonar returns on the display. When Max
Mode is selected, you will see the maximum sonar information available within
the transducer beam, so more fish arches and better jig tracking are shown.
Choose
Clear Mode
to see less clutter and more fish size accuracy on the
display. When Clear Mode is selected, the clutter is filtered, and sonar
returns are interpreted to provide more details about the objects within the
transducer beam, regardless of their location. In other words, a large arch on
the display means a large fish has been detected.
Surface Clutter
75 Degree Total Coverage
16°
25°
455kHz
200kHz
75°
455kHz
45°
800kHz
Summary of Contents for 858 HD DI
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