Humminbird 561 User Manual
Page 4
Power On
1
How Sonar Works
2
Single Beam Sonar
(550, 560)
.................................................................................... 4
DualBeam PLUS™ Sonar
(561, 570)
.......................................................................... 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
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 [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, and 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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