Humminbird 515 Operation Manual page 5

Wha t' s On the Scr een
Wha t' s On the Scr een
The Humminbird FishFinder can display a variety of useful information about the area
Depth - water depth; can be set to alarm when the
water becomes too shallow.
Temperature - water surface temperature.
Timer - Elapsed time with Temp/Speed Accessory.
Distance - Distance traveled with Temp/Speed
Accessory.
Average Speed - Average speed reading with
Temp/Speed Accessory.
Bait Ball
Hard Bottom
Rocky Bottom
Second Sonar Return - when the sonar signal
bounces between the bottom and the surface of
the water and back again. Use the appearance of
the second return to determine bottom hardness.
Hard bottoms will show a strong second return,
while soft bottoms will show a very weak one or
none at all.
2
Speed - if a Temp/Speed accessory is attached, the
keep a Triplog of nautical or statute miles traveled.
under and adjacent to your boat, including the following items:
FishFinder can display the speed of the boat, and can
Structure - where fish may be hiding.
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.
200kHz, Narrow Beam Shaded Fish Symbol
83kHz, Wide Beam Hollow Fish Symbol
(Dual Beam Units Only)
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.
Soft Bottom
RTS® (Real Time Sonar) Window
Battery Voltage - the voltage of the boat's battery;
can be set to alarm if the voltage falls below a
certain point.
3