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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.
DualBeam PLUS™ sonar models represent targets detected in the 200 kHz
narrow beam as Shaded Fish Symbols and targets detected in the 83 kHz wide
beam as Hollow Fish Symbols.
200 kHz, Narrow Beam
Shaded Fish Symbols
When Fish ID+™ is turned off, the Fishing System 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. Press the LEFT or RIGHT Cursor keys to turn the Fish ID+™ setting On or
Off. (Off, On, Default = Off)
Fish ID+™
Fish ID+™ uses advanced signal processing to
Transducer Cone and Fish Arches
61
83 kHz, Wide Beam
Hollow Fish Symbols
Sonar Menu Tab
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