Humminbird 500 SERIES 580, Operation Manual

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Bottom View
Bottom View selects the method used to
represent bottom and structure on the display.
Inverse represents weak returns as dark pixels and strong returns as lighter
pixels. This has the benefit of ensuring that weak signals will be clearly visible
on the display.
Structure ID® represents weak returns as light pixels and strong returns as dark
pixels. This has the benefit of ensuring that strong returns will be clearly visible
on the display.
WhiteLine® highlights the strongest sonar returns in white resulting in a
distinctive outline. This has the benefit of clearly defining the bottom on the
display.
Bottom Black displays all pixels below the bottom contour as black, regardless
of signal strength. This has the benefit of providing a high contrast between the
bottom and other sonar returns on the display. Any targets such as fish,
structure and thermoclines will be shown using the Structure ID® method.
See Bottom Presentation for more information.
To adjust the Bottom View:
1. Highlight Bottom View on the Sonar X-Press™ Menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the
Bottom View setting. (Inverse, Structure ID®, WhiteLine®, Bottom
Black, Default = Inverse)