Humminbird 900 Series, 997c Combo manual Sonar Bottom Presentation

Sonar Bottom Presentation	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.
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.

NOTE: A sloping bottom will be represented as a thicker line across the display. Harder bottoms typically will be displayed with red and softer bottoms typically will be displayed with blue.

The sonar returns from the bottom, structure and fish can be represented as either Structure ID® or WhiteLine®. See Sonar Menu: Bottom View for details on how to set the bottom view.

Structure ID® represents weak returns in blue and strong returns in red.

28