Humminbird 515 User Manual
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the area under and adjacent to your boat, including the following items:
device is connected to the Fishfinder.
Battery Voltage - the voltage of the boat’s
battery; can be set to alarm if the voltage
falls below a certain point.
RTS® (Real Time Sonar) Window
Soft Bottom
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 gray levels moving
across the display at the same depth.
Structure - where fish may be hiding.
Fish - fish are displayed as arches and/or
fish icons, and the unit can be set to alarm
when a fish of a certain size is detected.
When a target is detected and Fish ID+
TM
is
on, a Fish ID+
TM
symbol with depth is
displayed. The size of the symbol shows 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.
83 kHz, Wide Beam Hollow Fish Symbol
(ONLY available on Dual Beam Units)
200 kHz, Narrow Beam Shaded Fish Symbol