Understanding The Sonar Display - Humminbird 586C Operation Manual

The returned sonar echoes are displayed
on the screen. As a new echo is received,
the historical data scrolls across the screen.
What's On the Sonar Display
U U n n d d e e r r s s t t a a n n d d i i n n g g t t h h e e S S o o n n a a r r D D i i s s p p l l a a y y
It is important to understand the significance of
the display. The display does not show a literal 3-
dimensional representation of what is under the
water. Each vertical band of data received by the
control head and plotted on the display represents
something that was detected by a sonar return at
a particular time. As both the boat and the targets
(fish) may be moving, the returns are only showing
a particular segment of time when objects were
detected, not exactly where those objects are in
relation to other objects shown on the display.
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