Humminbird 757c Operation Manual page 19

531528-1_A - 757c_787c2_&_787c2i_Man_Eng.qxp
out the area under and adjacent to your boat, including the following items:
her device is connected to the 700 Series™ Fishing System. If both devices are connected, then only
High Sonar Intensity Return
Bait Ball
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
Fish - the Fishing System 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+™ 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.
200 kHz Orange Fish Symbol
Structure - where fish may be hiding.
RTS® (Real Time Sonar) Window
Low Sonar Intensity Return
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10/16/2006 10:41 AM Page 19