Humminbird 4089701 Sonar Returns and Bottom View, Bottom Contour

Sonar Returns and Bottom View

Bottom View, Inverse Palette

As the boat moves, the unit charts the

HIGHchanges in depth on the display to create a

Intensity Return

profile of the Bottom Contour. The Sonar View displays the sonar return intensity using gray scale.

		Strong returns often result from rocky or
MEDIUM		hard bottoms (compacted sediment, rocks,
		fallen trees), while weaker returns often
Intensity Return
		result from soft bottoms (sand, mud),
		vegetation, and small fish.
		The shades used to represent high, medium,
LOW		to low intensity returns are determined by
		the setting you choose in the Bottom View
Intensity Return
		menu option. See Sonar X-Press™ Menu to
		set the Bottom View.
		Sonar View:
	Bottom View set to Inverse (default setting)
Sonar History:			Weak Returns
Historical Returns
scroll left across			(possibly
			vegetation or
the view.
			small fish)
Strong Returns			RTS Window™
(possibly rocks,			Strong Return
tree limbs, or
			(possibly
other structure)
			compacted
			sediment or
			rocks)

10 What’s on the Sonar Display