Humminbird Fish Finder 409010-1 User Manual

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What’s on the Sonar Display
Understanding the Sonar Display
It is important to understand the significance of
the display. The display does NOT show a literal
3-dimensional representation of what is under
the water. Each vertical band of data received
by the control head and plotted on the display
represents something that was detected by a
sonar return at a particular time. As both the
boat and the targets (fish) may be moving, the
returns are only showing a particular segment
of time when objects were detected, not exactly
where those objects are in relation to other
objects shown on the display.
The returned sonar echoes are displayed on the screen. As a new echo is
received, the historical data scrolls left across the display.
Real Time Sonar (RTS™) Window
A Real Time Sonar (RTS™) Window appears on the right side of the display in
the Sonar View only. The RTS™ Window always updates at the fastest rate
possible for depth conditions and shows only the returns from the bottom,
structure and fish that are within the transducer beam. The RTS™ Window
plots the depth and intensity of a sonar return. (See Sonar Menu Tab: Real
Time Sonar (RTS™) Window).
SwitchFire™
SwitchFire™ controls how the sonar returns are displayed in the Sonar
Views. SwitchFire™ settings are available in the Sonar Menu Tab.
To see the maximum sonar information available within the transducer beam
so more fish arches and better jig tracking are shown, choose Max Mode.
To see less clutter and more fish size accuracy interpreted from the
transducer beam, choose Clear Mode. See Sonar Menu Tab: SwitchFire™
for more information.
The Narrow RTS™ Window
indicates the sonar intensity
through the use of colors.
Redindicatesastrongreturn
and blue indicates a weak
return. The depth of the
sonar return is indicated by
the vertical placement of the
return on the display depth
scale.
The Wide RTS™ Window
indicates the sonar intensity
through the use of a bar
graph. The length of the
plotted return provides an
indication of whether the
returnisweakorstrong. The
depth of the sonar return is
indicated by the vertical
placement of the return on
the display depth scale.

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