Settings
To select a Fishing Mode:
1.Select Fishing Mode from the Sonar Settings menu and press
Enter.
2.Use the keypad to select the desired mode and press enter.
Reset Fishing Mode
Resets selected fishing mode to default settings. That is useful when you want to clear settings adjustments made while using a fishing mode. To restore fishing mode defaults, select Reset Fishing Mode and press ENTER
Installation Menu
Controls unit settings like Keel Offset, Water Speed Calibration and Transducer Type (only for components connected to this display unit through the blue sonar connector). You can not adjust settings of network components through the Installation menu.
To access the Installation menu, highlight Installation on the Sonar Settings menu and press ENTER.
Sonar Installation menu
Keel Offset
All transducers measure water depth from the transducer to the bottom. As a result, water depth readings do not account for the distance from the transducer to the keel or from the transducer to the water surface. You can use Keel Offset to factor those distances into the unit’s depth calculations.
Transducer 
Keel
Keel Offset (-3.5 feet)
Accounting for the distance from the transducer to the keel will prevent you from striking underwater objects or running aground, which could damage the keel. Offsetting the distance from the transducer to the water surface will give you a more precise depth reading.
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