Humminbird 596C HD DI - Manual (Page 57)

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NOTE: A minimum distance of 10 feet will be maintained between the Upper and
Lower Range regardless of the manual settings entered.
Chart Speed
Settings: 1-9, Ultra, where 1 = Slow, 9 = Fast, Ultra =
Fastest; Default = 5
Chart Speed determines the speed at which the sonar information moves across
the display, and consequently the amount of detail shown.
A faster speed shows more information and is preferred by most anglers;
however, the sonar information moves across the display quickly. A slower speed
keeps the information on the display longer, but the bottom and fish details
become compressed and may be difficult to interpret. Regardless of the Chart
Speed setting, the RTS Window™ will update at the maximum rate possible for
the depth conditions. Adjust Chart Speed to your personal preference.
Zoom Level
(Sonar Zoom View only)
Settings: 2x, 4x, 6x, 8x, Default = 2x
Zoom Level sets the magnification level for the Sonar Zoom View. Use Zoom to
see more detail in the bottom sonar returns that might be displayed close
together, such as those caused by fish suspended close to the bottom or within
structure.
Zoom Level is only available on the X-Press™ Menu from the Sonar Zoom View.
The Zoom Preview Box shows the section of the bottom that will be magnified.
NOTE: The Zoom Preview Box tracks the bottom and cannot be moved.
For example, if you are fishing in 60 feet of water but are only interested in the
first 30 feet (surface to a depth of 30 feet), you should set the Lower Depth
Range limit to 30. The display will show the 0 to 30 foot range, which allows you
to see a more detailed view than you would see if the display went all the way
to the bottom.
Sonar X-Press™ Menu