Humminbird Marine GPS System Di Combo User Manual

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What’s onthe DownImaging™ Display
(Down Imaging™ models only [386ci DI])
information aboutthearea directly below your boat. Therazor-thin, high-definition
Down Imaging™ reveals a variety of recognizable features so that you can
Upper Range
Clouded Area may indicate a bait ball and
White Streaks may indicate fish.
either device is connected to the 300 Series™ Fishfinder. If both devices are connected,
Lower Range
Structure
Shadows-Result fromalack ofreflectedsonar
from aparticular area andcan be asvaluable
for interpretation than the sonar reflected by
theobject itself.Use shadows tohelpyousee
the image in 3dimensions, oriented in space.
You can gain insight into the actual shape of
an object, or the depth to which it has sunk
into the bottom, through shadows on the
display. Objects standing on the bottom cast
a sonar shadow. The longer the shadow, the
taller the object. Fish also cast shadows. You
can use the shadow to interpret how close
the fish is to the bottom.

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