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10
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 - RTS® Window).
Freeze Frame
Freeze Frame - Pressing any arrow on the 4-WAY Cursor Control key will freeze the
screen and a cursor will be displayed on the screen. The cursor can be positioned on
the display using the 4-WAY Cursor Control key to determine the depth of any sonar
return. The RTS® Window continues to update in Freeze Frame. In addition, see the
effects of menu setting changes with Instant Image Update. Pressing EXIT will exit
Freeze Frame and the display will start to scroll. Freeze Frame is available in Sonar,
Sonar Zoom and 200/83 kHz Split Sonar Views.
The Narrow RTS® Window
indicates the sonar intensity
through the use of grayscale.
The grayscale used matches
the bottom view grayscale
setting used in the sonar
history window (i.e. Inverse,
Structure ID®, WhiteLine®,
Bottom Black). 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
return is weak or strong. The
depth of the sonar return is
indicated by the vertical
placement of the return on
the display depth scale. The
Wide RTS® Window does not
make use of grayscale.
9
Understanding Sonar History
It is important to understand the significance
of the 300 Series™ Fishing System 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.
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