Humminbird 343c User Manual download pdf (Page 9)

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.

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

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.

Temp/Speed Accessory is optional.

Rocky Bottom

Hard Bottom

Soft Bottom

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Humminbird 343c User Manual Page 9