Humminbird 409380-1 Marine GPS System User Manual


 
23
Sonar Colors and Bottom View
As the boat moves, the unit charts the changes
in depth on the display to create a profile of the
Bottom Contour. The Sonar View displays the
sonar return intensity with different colors.
Strong returns often result from rocky or hard
bottoms (compacted sediment, rocks, fallen
trees), while weaker returns often result from
soft bottoms (sand, mud), vegetation, and small
fish.
The colors used to represent high, medium, to
low intensity returns are determined by the
palette you choose in the Sonar Colors menu
option. See Sonar Menu Tab to set the Sonar
Colors.
Sonar View: Original Palette
Sonar History: Historical Returns
scroll left across the view.
Strong Return
(possibly compacted
sediment or rocks)
Weak Returns
(possibly vegetation
or small fish)
RTS Window
Strong Returns
(possibly rocks, tree limbs,
or other structure)
HIGH
Intensity Return
MEDIUM
Intensity Return
LOW
Intensity Return
Sonar Colors: Original Palette
What’s on the Sonar Display