Humminbird 383c - Manual (Page 13)

under and adjacent to your boat, including the following items:
RTS® (Real Time Sonar) Window
Structure - where fish may be hiding.
Thermoclines - layers of water with different
temperatures that appear at different depths
and different times of the year. A thermocline
typically appears as a continuous band of
many colors moving across the display at the
same depth.
83 kHz Blue Fish Symbol
Bait Ball
Fish - the FishFinder displays fish as arches
and/or fish icons, and can be set to alarm when
a fish of a certain size is detected. When a
target is detected, a Fish ID+
TM symbol appears
on the display with the depth displayed above
it. The size of the symbol indicates the intensity
of the sonar return. The unit will clearly show
schools of Bait Fish as "clouds" of different
shapes and sizes, depending on the number of
fish and boat speed.
Low Sonar Intensity Return
High Sonar Intensity Return
device is connected to the 300 Series™ Fishing System. If both devices are connected, then
200 kHz Orange Fish Symbol
6