Humminbird 778C - Manual (Page 64)

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Lower Range
Settings: Various, see below.
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.
Adjust the Upper and Lower Range together to view a specific depth range,
especially when looking for fish or bottom structure.
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:
• 778c HD: Auto to 1500 ft, Auto to 500 m (International Models only);
Default = Auto
• 778c HD XD: Auto to 3200 ft, Auto to 975 m (International Models
only); Default = Auto
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.
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