Fish Id+ Tm - Humminbird 161 Operation Manual

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.
TM
The 100 Series
narrow beam as Shaded Fish Symbols.
When Fish ID+ TM is turned off, the 100 Series
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+
On or Off. (Off, On, Default = Off)
Fish ID+
Fish ID+
Fishing System models represent targets detected in the 200 kHz
Transducer Cone and Fish Arches
TM
TM
uses advanced signal processing to interpret
200 kHz, Narrow Beam
Shaded Fish Symbols
TM Fishing System shows only the raw sonar
48
TM
setting