Humminbird SINGLEBEAM 405SX, Operation Manual

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Bottom Black. There are two selections
available: Off and On. The factory setting is
Off. With this setting, the
405SX displays
the bottom using 4 level grayscale. This
allows you to determine the texture and
relative hardness of the bottom. Selecting
Bottom Black “ON” causes the unit to
blacken in the display below
the bottom. This gives the
user easiest recognition of the
bottom location, even from a
great distance.
The 405SX remembers the
Bottom Black setting when
powered off.
Fish ID. There are three
selections available: Off, ID+
ON, and Adjust. The factory
setting is ID+ OFF. With Fish ID
Off, sonar returns are
displayed as “raw” information. There is no interpretation made by the unit.
Selecting ID ON also enables the fish alarm.
ID+ On enables the to interpret the raw sonar data and,
using a variety of techniques, depict appropriate target
returns as one of three different size fish symbols. Further
identification shows which beam the fish is detected in.
The
405SX also displays the depth beneath the surface
with the corresponding fish symbol.
Selecting Adjust and making incremental changes
enhances the fishfinder’s ability to identify sonar
returns as fish symbols.
Increasing the value to a number greater than zero
shows more fish symbols on-screen. In this case
smaller sonar returns will be depicted as fish
symbols. This is useful for identifying many smaller
sonar returns (such as bait fish) as fish symbols.
22
USING THE
405SX
MENU FUNCTIONS
ID+ On Raw Sonar
Bottom Black View