Humminbird 561 - Table of Contents

Power On 1
How Sonar Works 2
Single Beam Sonar (550, 560) .................................................................................... 4
DualBeam Sonar
(570)................................................................................................ 5
DualBeam PLUS™ Sonar
(561)....................................................................................5
Down Imaging™ Sonar
(570 DI).................................................................................. 6
What’s on the Sonar Display 7
Understanding the Sonar Display ............................................................................ 9
Real Time Sonar (RTS™) Window ............................................................................ 9
SwitchFire™ ............................................................................................................ 10
Freeze Frame and Active Cursor.............................................................................. 10
Instant Image Update.............................................................................................. 10
Bottom Presentation ................................................................................................ 11
What’s on the Down Imaging™ Display
(Down Imaging™ models only [570 DI]) 13
Understanding the Down Imaging™ Display ........................................................ 15
Interpreting the Display .......................................................................................... 15
Down Imaging™ Sensitivity.................................................................................... 16
Freeze Frame and Active Cursor.............................................................................. 16
Views 17
Sonar View .............................................................................................................. 19
Sonar Zoom View .................................................................................................... 20
Split Sonar View
(DualBeam PLUS™ and Down Imaging™ models only [561, 570 DI])...... 21
Big Digits View ........................................................................................................ 22
Down Imaging™ View
(Down Imaging™ models only [570 DI]).................................... 23
Down Imaging™/Sonar Combo View
(Down Imaging™ models only [570 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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