Lowrance electronic HDS-5, HDS-7 manual Datum, Coord System, Magnetic Variation

Settings

Datum

A model of the earth’s surface based on a network of surveyed ground features (points). This unit’s default datum is WGRS-84.

To select a Datum:

1.Select Datum from the Chart settings menu and press enter.

2.Use the keypad to select the desired datum. Press Enter.

Coord System

Controls the coordinate system used when position coordinates are entered and displayed.

To change Coordinate System:

1.Select Coord System from the Chart settings menu and press enter.

2.Highlight the desired option and press enter.

Magnetic Variation

Converts magnetic north data to true north, increasing the accuracy of navigation information. The Magnetic Variance Auto setting, automatically converts magnetic north to true north. When using manual mode, you will have to input the magnetic variance.

To change magnetic variation settings:

1.Highlight Magnetic Variation on the System menu. Press ENTER.

2.Select Auto or Manual and press enter.

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