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7. FISH FINDER (SOUNDER)
7-3
7.2.2 Dual frequency display
The dual frequency display provides both low and high frequency pictures, the low fre-
quency on the left half (default). Use the dual frequency display to compare the same
picture with two different sounding frequencies.
How to select the dual frequency display
Tap the screen to show the pop-up menu. Tap [Mode], [Dual Freq.].
7.2.3 Zoom displays
Zoom mode expands selected area of the single frequency picture. Two modes are
available: bottom lock and bottom zoom.
How to activate, deactivate a zoom display
Tap the screen to open the pop-up menu. Tap [Mode], then tap [Bottom Lock] or [Bot-
tom Zoom]. To quit the zoom display and go to the single frequency display, tap
[Mode], [Single Freq.] on the pop-up menu.
Bottom lock display
The bottom lock display provides a compressed normal picture on the right half and a
7 to 400 feet (2 to 120 meter) wide layer in contact with the bottom is expanded on the
left half. This display helps you separate the fish near the bottom from the bottom
echo. You can select the bottom lock range with [Bottom Lock Range Span] in the
[Settings] - [Sounder] menu.
Low
frequency
High
frequency
RADAR
DAR
DAR
AR
AR
R
R
R
R
R
R
R
Freq.
(kHz)
Low
High
Beamwidth Resolution
Detection
range
Bottom
tail
Wide
Narrow
Low
High
Deep
Shallow
Long
Short
ft
LF/HF
40.4
Zoomed
school of fish
Bottom lock display Single freq. display
Zoom marker
School of fish
This area zoomed
and displayed on
left 1/2 of screen.
Bottom shown as a straight line
ft
BL/LF
40.4