Humminbird HELIX 5 SERIES Operation Manual page 118

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.
In DualBeam PLUS models (HELIX SONAR GPS), targets detected in the 200 kHz narrow beam
are represented as orange fish symbols, and targets detected in the 83 kHz wide beam are
represented as blue fish symbols.
In Down Imaging models (HELIX DI GPS), targets detected in the 455 kHz conical beam are
represented as blue fish symbols, and targets detected in the 200 kHz conical beam are
represented as orange fish symbols.
In Xtreme Depth models (HELIX XD GPS), targets detected in the 200 kHz narrow beam are
represented as orange fish symbols and targets detected in the 50 kHz wide beam are represented
as blue 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.
Sonar Menu Tab
Fish ID+
Settings: Off, On; Default = Off
orange fish symbols
Transducer Cone and Fish Arches
blue fish symbols
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