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How Sonar Works
1
DualBeam PLUS™ Sonar ........................................................................................................ 3
QuadraBeam PLUS™ Sonar
(with optional-purchase QuadraBeam PLUS™ transducer)
...... 4
WideSide® Sonar
(with optional-purchase WideSide® transducer)
........................................ 5
Universal Sonar 2 .................................................................................................................... 5
How GPS and Cartography Work
6
Multi-Media Card (MMC)/SD Slot
8
Software Updates.................................................................................................................... 8
What’s On the Display
9
Views
11
Sonar View ............................................................................................................................ 12
Understanding Sonar History................................................................................................ 13
Real Time Sonar (RTS®) Window.......................................................................................... 14
Freeze Frame and Cursor ...................................................................................................... 14
Bottom Presentation.............................................................................................................. 15
Sonar Zoom View ..................................................................................................................18
200/83 kHz Split Sonar View .............................................................................................. 19
Big Digits View ...................................................................................................................... 20
Circular Flasher View ............................................................................................................ 21
Snapshot and Recording View.............................................................................................. 22
Side Beam View
(with optional-purchase QuadraBeam PLUS™ transducer)
........................ 27
WideSide® View
(with optional-purchase WideSide® transducer)
........................................ 30
Bird's Eye View ...................................................................................................................... 31
Chart View ............................................................................................................................ 32
Combo View .......................................................................................................................... 34
View Orientation .................................................................................................................... 35
Viewing Cartography
35
Table of Contents
Summary of Contents for 757c
Page 25: ...16 Structure ID represents weak returns in blue and strong returns in red...
Page 168: ...159 Notes...
Page 169: ...160 Notes...