A setting of -2 sets the sensitivity two steps below what the unit would normally select, so
only the largest targets or other returns are displayed.
The LCR W adjusts the depth range automatically, so the bottom return is displayed at
the bottom 1/3 of the display. This leaves the top 2/3 to display anything
between the surface and the bottom. As your boat moves over deeper or shallower water, the unit
adjusts the depth range of the display to keep the bottom return in the same general area on the
screen.
However, you may choose to control this range adjustment manually. By pressing the UP
and DOWN arrow buttons you can select manual operation, meaning the unit will no longer adjust
the depth range automatically. The depth range selected is also controlled by the UP and DOWN
arrow buttons. Ranges of 0-15, 30, 60, 120, 180, 240, 360, 480, & 600 feet can be selected. An
on-screen icon indicates whether the unit is in "AUTO" (automatic) or "MNL" (manual) range
control.
If you alter the depth range, Manual operation is automatically selected. This feature is
valuable if you are only interested in targets near the surface. The LCR W will always display the
digital depth of the water, regardless of whether the bottom is shown on the selected depth range.
