Bottom Presentation - Humminbird Matrix 97 Operation Manual

Bottom Presentation

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 StructureID® or
WhiteLine®. See Sonar X-Press
TM
Menu: Bottom View for details on how to set the bottom view.
Structure ID® represents weak returns in blue and
strong returns in red.
WhiteLine® highlights the strongest sonar returns in
white, resulting in a distinctive outline. This has the
benefit of clearly defining the bottom on the display.
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