Humminbird 500 SERIES 596C - Manual (Page 16)

8
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As the boat moves, the unit charts the changes in depth on the display to create
a profile of the Bottom Contour. The type of bottom can be determined from
the return charted on the display. A Hard Bottom such as compacted sediment
or flat rock appears as a thinner line across the display. A Soft Bottom such as
mud or sand appears as a thicker line across the display. Rocky Bottoms have
a broken, random appearance.
The sonar returns from the bottom, structure, and fish can be represented as
either WhiteLine™ or Structure ID®. See Sonar Menu: Bottom View for details
on how to set the bottom view.
Bottom Contour Profile with RTS Window™
Rocky Bottom
Hard Bottom
Soft Bottom
What’s On the Sonar Display