Humminbird 747c Operation Manual page 13

531526-1_A - 747c_&_777c2_Man_Eng.qxp
about the area under and adjacent to your boat, including the following items:
her device is connected to the Fishing System. If both devices are connected, then only the
10/2/2006
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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