Bottom Presentation - Humminbird 757c Operation Manual

531528-1_A - 757c_787c2_&_787c2i_Man_Eng.qxp

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.
Rocky Bottom
Soft Bottom
The sonar returns from the bottom, structure and fish can be represented as
either WhiteLine® or Structure ID®. See Sonar Menu Tab: Bottom View for
details on how to set the bottom view.
Bottom Contour Profile with RTS® Window.
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Hard
Bottom
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