Insignia manual Using the 250DX

ID+ On

Raw Sonar

USING THE 250DX

MENU FUNCTIONS

Fish ID. There are three selections available: Bottom Black View

OFF, ID+ ON, and ADJUST. The factory setting is ID+ ON. With Fish ID OFF, sonar returns are displayed as “raw” information.

There is no interpretation made by the unit. Selecting ID OFF also disables the fish alarm.

ID+ ON enables the 250DX to interpret the raw sonar data and, using a variety of techniques, depict appropriate target returns as one of three different size fish symbols. Further identification shows whether the fish is in the wide or narrow beam. The 250DX also displays the depth beneath the surface with the corresponding fish symbol.

Selecting Adjust and making incremental changes enhances the fishfinder’s ability to identify sonar returns as fish symbols.

Increasing the value to a number greater than zero shows more fish symbols on-screen. In this case smaller sonar returns will be depicted as fish symbols. This is useful for identifying many smaller sonar returns (such as baitfish) as fish symbols.

Decreasing the value to a number less than zero shows fewer fish symbols on-screen. In this case smaller sonar returns are disregarded. This is useful for eliminating many small sonar returns when seeking larger species of fish.

The 250DX remembers this selection even when the unit is powered off.

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