Operations Manual

9
Understanding Sonar History
It is important to understand the significance
of the 300 Series™ Fishing System 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.Asboth the boat and thetargets(fish)may be
moving, the returns are only showing a particular
segment of time when objects were detected, not
exactly where those objects arein relation to other
objects shown on the display.