Fish Id+ Tm - Humminbird 737 GPS Operation Manual

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.
Targets detected in the 200 kHz narrow beam are represented as Shaded Fish Symbols, and
targets detected in the 83 kHz wide beam are represented as Hollow Fish Symbols.
200 kHz, Narrow Beam Shaded
When Fish ID+TM 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. Use the LEFT or RIGHT 4-WAY Cursor Control keys to turn the Fish ID+TM setting On or
Off. (Off, On, Default = Off)
Fish ID+
Fish ID+
Fish Symbols
Transducer Cone and Fish Arches
TM
TM uses advanced signal processing to interpret sonar
83 kHz, Wide Beam
Hollow Fish Symbols
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