Humminbird 363 - Manual (Page 18)

11
Inverse is a method where weak returns are shown
with dark pixels and strong returns with 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.