Humminbird 561 Fish Finder User Manual


 
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
(570DI).................................................................................. 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 Imagingmodels only [570 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™ models only[561, 570DI])...... 21
Big Digits View ........................................................................................................ 22
Down Imaging™ View
(DownImaging™models only[570 DI]).................................... 23
Down Imaging™/Sonar Combo View
(DownImaging™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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