Humminbird 585C User Manual

Page 15

Fish Sensitivity

Fish Sensitivity adjusts the threshold of the Fish ID+™

detection algorithms. Selecting a higher setting allows weaker returns to be displayed as
fish. This is useful for identifying smaller fish species or baitfish. Selecting a lower setting
displays fewer fish from weak sonar returns. This is helpful when seeking larger species
of fish. Fish Sensitivity is used in conjunction with Fish ID+™. Fish ID+™ must be On for
Fish Sensitivity to affect the ability of the FishFinder to identify sonar returns as fish.

To change the Fish Sensitivity setting:

1. Highlight Fish Sensitivity on the Sonar main menu.

2. Use the LEFT or RIGHT 4-Way Cursor Control keys to change the Fish Sensitivity

setting. (Low = 1, High = 10, Default = 5)

Real Time Sonar (RTS®) Window

(Sonar View Only)

RTS® Window sets the RTS® window to either Wide or Narrow, or turns it off in the
Sonar View. The RTS® window always updates at the fastest rate possible and only
displays returns that are within the transducer beam. (See Real Time Sonar (RTS®)
Window for additional detail).

To change the RTS® Window setting:

1. Highlight RTS Window on the Sonar main menu.

2. Use the LEFT or RIGHT 4-Way Cursor Control keys to change the RTS® Window

setting. (Wide, Narrow, Off, Default = Narrow)

RTS® Window (Narrow)

RTS® Window (Off)

RTS® Window (Wide)

Fish ID+™

Fish ID+™ uses advanced signal processing to interpret

sonar returns, and will display a Fish Symbol when very selective requirements are met.
When a fish is detected, a fish icon and its depth are displayed above the return that has
been classified as being a fish. Three different fish size icons represent the intensity of
the sonar return, and provide an indicator of relative fish size. Single beam sonar
FishFinders represent targets as orange Fish Symbols.

When Fish ID+™ is turned off, the FishFinder shows only the raw sonar returns on the
display. These returns will often result in "arches" forming on the display, indicating
potential targets. Due to the transducer beam angle, the distance to a fish decreases as
the fish moves into the beam, and then increases as it moves out again, creating a Fish
Arch when this distance change is shown on the display. Boat speed, chart speed, and
the position of the fish within the sonar beam greatly affect the shape of the arch.

To turn Fish ID+™ on or off:

1. Highlight Fish ID+ on the Sonar main menu.

2. Use the LEFT or RIGHT 4-Way Cursor Control keys to turn the Fish ID+™ setting

On or Off. (On, Off, Default = On)

Transducer Cone and Fish Arches

200 kHz Fish Symbols

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