What's On The Sonar Display - Humminbird 858c Combo Operation Manual

What's on the Sonar Display

The Fishing System can display a variety of useful information about the area under and adjacent to your boat, including the following items:
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1 Depth - Water depth; can be set to alarm when the water becomes too shallow.
2 Timer - Elapsed time with Speed accessory or GPS Receiver.
3 Distance - Distance traveled with Speed accessory or GPS Receiver.
4 Average Speed - Average speed reading with Speed accessory or GPS Receiver.
What's on the Sonar Display
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5 Barometric Pressure - Requires optional-purchase
WeatherSense®
Temperature - Water surface temperature
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7 Speed - If a Speed accessory or GPS Receiver is attached,
the Fishing System can display the speed of the boat, and
can keep a triplog of nautical or statute miles traveled.
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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.
Sonar Color Bar - Color spectrum
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indicating low to high sonar intensity
returns, where red indicates high intensity
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and white indicates low intensity.
10 Bait Ball
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RTS (Real Time Sonar) Window™
12 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
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determine bottom hardness. Hard bottoms
will show a strong second return, while soft
bottoms will show a very weak one or none
at all.
Cursor - Available in Freeze Frame and can
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be positioned in the Sonar View to provide
depth of a sonar retun and bottom depth
below the cursor. The Latitude and
Longitude of the cursor position, the
distance to travel to the cursor position, and
the bearing to the cursor position are
shown with a GPS Receiver attached.
Cursor information is displayed at the top of
the screen.