Humminbird 797C2 - How Sonar Works; Side Imaging Sonar; DualBeam PLUS Sonar

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How Sonar Works 1
Side Imaging Sonar.................................................................................................... 3
DualBeam PLUS™ Sonar .......................................................................................... 3
QuadraBeam PLUS™ Sonar
(with optional-purchase QuadraBeam PLUS™ transducer).............................................. 4
Universal Sonar 2 ...................................................................................................... 5
How GPS and Cartography Work 5
Multi-Media Card (MMC)/SD Slot 7
Software Updates ...................................................................................................... 7
Understanding Side Imaging 8
What's On the Side Imaging Display...................................................................... 10
Side Imaging Technology: How It Works .............................................................. 12
Side Imaging: On the Water Interpretation............................................................ 13
What’s On the Sonar Display 18
Views 20
Side Imaging View .................................................................................................. 21
Sonar/Side Combo View.......................................................................................... 23
Sonar View .............................................................................................................. 24
Understanding Sonar History.................................................................................. 25
Real Time Sonar (RTS®) Window ............................................................................ 25
Freeze Frame and Cursor ........................................................................................ 26
Bottom Presentation................................................................................................ 27
Sonar Zoom View ....................................................................................................30
200/83 kHz Split Sonar View .................................................................................. 31
Big Digits View ........................................................................................................ 32
Circular Flasher View .............................................................................................. 33
Snapshot and Recording View................................................................................ 34
Table of Contents