Sonar Zoom View - Humminbird 727 Operation Manual

531425-1_D - 727 Man_English.qxd
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.
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Sonar Zoom View

Sonar Zoom View increases the displayed resolution to separate sonar returns that
are very close together, such as those caused by fish suspended close to the bottom
or within structure. In Zoom View, the display is split to show a narrow slice of the
full range view on the right and the zoomed view on the left. The full range view on
the right also contains the Zoom Preview Box that shows what part of the full range
view is shown in zoom view on the left; the Zoom Preview Box tracks the bottom in
the full range view.
As the depth changes, the zoomed view updates automatically to display a
magnified image of the bottom. The Zoom Preview Box shows where the zoomed
view is in relation to the full range view. The Zoom Level, or magnification, is
displayed in the lower left corner and can be changed to suit conditions (see Sonar
X-Press TM Menu: Zoom Level). Upper and Lower Zoom Depth Range numbers indicate
the depth of the water which is being viewed.
Digital depth is displayed in the upper left hand corner. The digital readouts in the
Sonar Zoom View cannot be customized; therefore, information such as water
temperature and voltage are unavailable in the Sonar Zoom View.
Sonar Zoom View
Depth
Zoomed
View
Zoom Level
12
Upper Depth Range,
Full Range View
Upper Depth Range,
Zoom View
Full Range View
Zoom
Preview Box
Lower Depth Range,
Full Range View
Lower Depth
Range, Zoom View