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of 92
 
Power On 1
How Sonar Works 2
Single Beam Sonar (550, 560) .................................................................................... 4
DualBeam PLUS™ Sonar
(561, 570) .......................................................................... 5
Down Imaging™ Sonar
(561DI,570 DI, and571HD DI)................................................ 6
What’s on the Sonar Display 7
Understanding the Sonar Display ............................................................................ 9
Real Time Sonar (RTS™) Window ............................................................................ 9
Sonar Returns and Bottom View ............................................................................ 10
SwitchFire™ ............................................................................................................ 12
Freeze Frame and Active Cursor ............................................................................ 12
Instant Image Update ............................................................................................ 12
What’s on the Down Imaging™ Display
(Down Imaging™ models only [561 DI, 570 DI, and 571 HD DI])
13
Understanding the Down Imaging™ Display ........................................................ 15
Interpreting the Display .......................................................................................... 15
Down ImagingSensitivity .................................................................................. 16
Freeze Frame and Active Cursor ............................................................................ 16
Views 17
Sonar View .............................................................................................................. 19
Sonar Zoom View .................................................................................................... 20
Split Sonar View
(DualBeam PLUS™and
DownImaging™ modelsonly[561, 570, 561DI,570 DI, and571HD DI])
........................ 21
Big Digits View ........................................................................................................ 22
Down Imaging™ View
(DownImaging™models only[561DI,570DI,and571HD DI]).. 23
Down Imaging™/Sonar Combo View
(DownImaging™models only
[561 DI, 570DI,and571HD DI])
................................................................................ 24
What's on the 500 Series™ Control Head 25
Key Functions 26
POWER/LIGHT Key .................................................................................................. 26
VIEW Key.................................................................................................................. 27
MENU Key................................................................................................................ 27
Table of Contents
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