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1. OPERATIONAL OVERVIEW
1-7
Dual-frequency displays
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Key
Key
DUAL-FREQ. VERTICAL SCAN
Dual-freq. display of vertical section of
fish echoes. Useful for judging depth
and center position of fish school.
(Chapter 3)
DUAL-FREQ. ECHO SOUNDER
Dual-freq. display of fish echoes
below vessel. (Chapter 4)
Display Display
x2
x2
x2 x2
DUAL-FREQ HORIZONTAL
360
°
dual-freq. display of fish echoes,
etc. (Chapter 2)
DUAL-FREQ. HORIZ. EXPANSION
Expansion of dual-freq. horizontal
display. (Chapter 2)
Depth/Temp. Display
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DATA
or
A-SCOPE
Dual-frequency displays