Chart Speed - Humminbird 688ci HD DI Operation Manual

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 manual settings entered.
The available Lower Range settings are determined by your Humminbird® model
as follows:
• 688ci HD: Auto to 1500 ft, Auto to 457 m (International Models only);
Default = Auto
• 688ci HD DI: Auto to 600 ft, Auto to 183 m (International Models only);
Default = Auto
• 688ci HD XD: Auto to 2500 ft, Auto to 975 m (International Models
only); Default = Auto
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.
Sonar X-Press™ Menu

Chart Speed

Settings: 1 to 9, Ultra, where 1 = Slow, 9 = Fast, Ultra =
Fastest; Default = 5
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