Humminbird 363 - Manual (Page 46)

Bottom Range
(Sonar Zoom view only when Bottom Lock is On)
Bottom Range allows you to control how much of the water column, measured up
from the bottom, is shown in the Sonar Zoom View. Choose a small value to see low-
lying bottom structure or details of the bottom return. Choose a larger value to see
large structure in deeper water. It is possible to set the Bottom Range to be greater
than the depth. In this case, you may see surface clutter in a wavy band that mirrors
changes in the depth.
To adjust the Bottom Range:
1. In the Sonar Zoom View, highlight Bottom Range on the Sonar X-Press TM menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Bottom
Range setting. (10 - 60 feet or 3-20 meters [International Models only],
Default = 15 feet)
Bottom Lock
(Sonar Zoom view only)
Bottom Lock changes the mode of the Zoomed view in the Sonar Zoom View. Bottom
Lock continuously graphs the bottom at a constant point on the display regardless of
changes in depth. This "flattens" out the bottom contour, but is effective at showing fish
on or near the bottom.
To turn on Bottom Lock:
1. In the Sonar Zoom View, highlight Bottom Lock on the Sonar X-Press TM Menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Bottom Lock
setting to on. (Off, On, Default = Off)
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