Lowrance HDS Gen3 Polaris, Руководство оператора

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Language
Controls the language used on this unit for panels, menus, and
dialogs. Changing the language causes the unit to restart.
Text size
Used for setting the text size in menus and dialogs.
Default setting: Normal
Key beeps
Controls the loudness of the beep sound when a key is pressed.
Default setting: Loud
Time
Controls the local time zone offset, and the format of the time and
date.
Datum
If your paper charts are in a different format, you can change the
datum settings accordingly to match your paper charts.
Coordinate system
Several coordinate systems can be used to control the format for
latitude and longitude coordinates displayed on the chart panel.
Magnetic variation
Magnetic variation is the difference between true bearings and
magnetic bearings, caused by different locations of the Geographic
and the Magnetic north poles. Any local anomalies such as iron
deposits might also affect the magnetic bearings.
When set to Auto, the system automatically converts magnetic
north to true north. Select manual mode if you need to enter your
own local magnetic variation.
Satellites
Status page for active satellites.
WAAS (and EGNOS) differential position correction can be
configured to ON or OFF.
Restore defaults
Allows you to select which settings are to be restored to their
original factory settings.
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Tools | HDS Gen3 Polaris Operator Manual