Upper Range (Advanced: Sonar, Split Sonar And Active Sonar Side Views Only); Lower Range - Humminbird 1158c Combo Installation And Operation Manual

Upper Range sets the shallowest depth range that will be displayed on the Sonar, Split Sonar,
and Active Sonar Side Views. Upper Range is often used with Lower Range.
For example, if you are only interested in the area between 20 and 50 feet deep, you should
set the Upper Depth Range to 20 and the Lower Depth Range to 50. The Sonar View will then
show the 30 foot area between 20 and 50, and will not show the surface or the bottom
(assuming the bottom is deeper than 50 feet), and will show greater detail for that area
between 20 and 50 feet.
NOTE: A minimum distance of 10 feet will be maintained between the Upper and Lower Range
regardless of the manual settings entered.
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.
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.
Sonar X-Press™ Menu
Upper Range
(Advanced: Sonar, Split Sonar and Active Sonar Side Views only)
Settings: 0 to 1490 or 0 to 497 meters [International models only];
Default = 0

Lower Range

Settings: AUTO, 10 to 1500 ft, 3 to 500 m [International Models only];
Default = AUTO
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