Lower Range; Chart Speed; Imaging Colors - Humminbird 598ci Operation Manual

Lower Range sets the deepest depth range that will be displayed by the unit.
Auto: The Lower Range will be adjusted by the unit to follow the bottom
automatically. Auto is the default setting.
Manual: You can adjust the Lower Range to lock the unit on a particular depth.
M will be displayed in the lower right corner of the screen to indicate the unit
is in Manual mode. Adjust the Upper and Lower Range together to view a
specific depth range, especially when looking for fish or bottom structure.
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.
NOTE: A minimum distance of 10 feet will be maintained between the Upper and
Lower Range regardless of the settings entered manually.
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.
Imaging Colors allows you to select which color palette you would like to use
for the Down Imaging™ display.

Lower Range

Settings: Auto to 1500 feet, Auto to 500 meters
(International Models only); Default = Auto

Chart Speed

Settings: 1 - 10, where 1 = Slow, 10 = Fast; Default = 5

Imaging Colors

Settings: Blue, Amber 1, Amber 2, Brown, Green, Inverse,
Gray, Green/Red; Default = Blue
109 Down Imaging™ X-Press™ Menu