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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.