531447-1_A_343c_Eng.qxd 11/11/2005 9:18 PM Page 16

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.

Bottom Contour Profile with RTS® Window.

Temp/Speed Accessory is optional.

Hard Bottom

Soft Bottom

Rocky 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.

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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Humminbird 343c manual Bottom Presentation